1

The light bulb

Image: Zach Lucero

Delivering electricity to the masses was one of the greatest technological advances in human history. The mid-1800s saw great competition in this area, as inventors around the world raced to invent their own electric light. The first filament bulb was developed by British inventor Warren de la Rue in 1840, but his use of a platinum filament made it expensive and impractical.

A few years later, Joseph Swan in the UK and Thomas Edison in the US each independently invented bulbs using cheaper elements. However, Edison received a patent on his bulb in early 1880, slightly before Swan. The light bulb, an invention that quickly reached every home, revolutionized life around the world, led to the development of the electrical grid, and set the stage for our modern electricity-dependent society.

2

The telephone

Image: viarami

In this modern era of emails and text messages, it can be hard to appreciate that the telephone was once revolutionary. The telegraph, the phone’s predecessor, only transmitted brief written messages. The telephone, however, allowed people to speak with one another in real time over long distances.

Inventor, scientist, and engineer Alexander Graham Bell invented the electric telephone in 1876. Although Bell was Scottish-born and also lived in Canada, he patented his invention in the US . The telephone was a game-changing technology that improved business efficiency, enabled instant global connections, and allowed emergencies to be reported as they occurred. It effectively made the world more connected and faster-paced.

3

The fire escape

Image: Lewis J Goetz

When we think of US inventions, the first things that come to mind are usually the light bulb or the telephone. But did you know that the modern fire escape was also a US innovation? Designed in 1887, this simple yet life-saving invention changed building safety forever.

In the late 1800s, fires were devastating cities across America. One woman, Anna Connelly, saw this horror up close and decided to do something about it. She designed an external iron staircase system, and in 1887, she patented it. At a time when women couldn’t even vote, Anna’s invention became a safety standard in most major cities, saving thousands of lives. Today her name is barely known, but next time you see a fire escape, remember the woman who made them possible.

4

The cash register

Image: Di Du

The first mechanical cash register for calculating and recording sales transactions was invented by saloonkeeper James Ritty following the American Civil War. He was looking for a way to stop cashiers from stealing, and finally patented his novel invention in 1879.

When a transaction was completed, Ritty's Incorruptible Cashier made a bell sound, and the amount was displayed on a large dial on the front of the machine. During each sale, a paper tape was hole-punched so the vendor could keep track of sales. Pretty ingenious, don’t you think?

5

Interchangeable parts

Image: gayulo

Standardized interchangeable parts for machines are now a staple of modern manufacturing, but it’s not a new idea. There’s evidence that thousands of years ago, ancient Carthage used them to build warships, and ancient China applied the idea to crossbows. Many centuries later, French experimentation with interchangeable musket parts inspired Thomas Jefferson.

In 1798, President George Washington and his Congress finally agreed to Jefferson’s idea of implementing the technology in America. They awarded a contract to Eli Whitney—the inventor of the cotton gin—to supply the government with 20,000 muskets. Whitney recognized the potential of developing firearms with identical parts and mechanisms. His advancements in interchangeable parts laid the foundation for modern manufacturing, enabling improved quality control, reduced costs, and faster production of goods.

6

The assembly line

Image: Public domain, via Wikimedia Commons

For most of human history, manufactured goods were custom-made. Every model of a machine, piece of clothing, or tool was unique. The development of interchangeable parts was a huge advancement, but automobile manufacturer Ransom Olds took it a step further with the assembly line in 1901. By standardizing and automating many aspects of manufacturing, uniform goods could be created faster and at lower costs.

Olds’ vehicle, the Oldsmobile Curved Dash, became the first mass-produced car . His method was later adopted and perfected by Henry Ford, whose moving assembly line for the Model T in 1913 revolutionized manufacturing. Today, the assembly line combines human labor and automation to produce nearly every mass-market product on Earth. Many experts agree it was one of the most significant technological developments of the 20th century.

7

The airplane

Image: Wright Brothers, Public domain, via Wikimedia Commons

People have always observed birds and insects and dreamed of flying. The Greeks told the story of Icarus and Daedalus, who crafted wings of wax and feathers; Leonardo da Vinci sketched and theorized flying machines, but it wasn’t until 1903 that the airplane became a reality in Kitty Hawk, North Carolina.

Wilbur and Orville Wright experimented with aeronautics for several years before achieving their successful first flight. A few years later, airplanes were first used in warfare. Within seven decades, their technology evolved and took us to the Moon. Today, the airplane is an indispensable technology that allows us to transport goods and people around the world in no time.

8

GPS

Image: Stanislav Kondratiev

It’s hard to imagine life without GPS—but do you know how it began? When the Soviet Union launched Sputnik in 1957, American physicists realized they could track the satellite’s radio transmissions using the Doppler effect.

Soon after, the U.S. military began testing and launching the Navstar Global Positioning System satellites. In 1983, President Ronald Reagan approved GPS for civilian use, and by the start of the 21st century, GPS devices were widely available in vehicles and mobile phones . Today, GPS is an essential technology for business, travel, and military operations.

9

Personal computers

Image: Unidentified U.S. Army photographer, Public domain, via Wikimedia Commons

The first electronic general-purpose computer, ENIAC, was built in 1946 at the University of Pennsylvania. It occupied 1,800 square feet of floor space and weighed 30 tons. At the time, imagining a consumer-grade computer small enough to fit in every home would have seemed impossible. Yet, just one generation later, the impossible became reality.

Over the years, computers became smaller, cheaper, and more powerful than the ENIAC’s creators could have imagined. In 1971, John Blankenbaker developed the first PC, the Kenbak-1. Fifty years later, it is clear that personal computing has fundamentally shaped the modern world.

10

The internet

Image: Lorenzo Herrera

Revolutionary technologies such as the wheel, the internal combustion engine, the telephone, and the airplane have forever changed the way we travel and communicate. The internet is no exception; it gives people access to the entirety of human existence with just a few clicks.

In 1969, computer scientists at the Advanced Research Projects Agency (ARPA) created the first network connecting labs at UCLA and Stanford. Over time, their network expanded, connecting anyone with a device. Since then, the internet has revolutionized the way human beings access resources and share information.

11

E-mail

Image: Brett Jordan

After the personal computer and the Internet, we only needed to invent a modern method of sending messages and letters to each other. The Advanced Research Projects Agency Network, known as ARPANET, sent the first email in 1971. Within five years, the majority of exchanges within the ARPANET community were via email.

With the introduction of attachments in the early 1990s, electronic mail became the fastest and easiest way to send information from point to point. By the start of the 21st century, email enabled people around the world to communicate quickly and inexpensively, and the technology quickly became one of the primary tools for global communications.

12

Magnetic resonance imaging

Image: MART PRODUCTION

The impact of the MRI machine on medicine is invaluable. The principles behind nuclear magnetic resonance (NMR) have been known since at least the end of World War II. Yet, two researchers in the late 1960s and early 1970s recognized the potential of this technology to revolutionize medicine forever.

American chemist Paul Lauterbur and physician Raymond Damadian separately experimented with NMR in scanning for cancer cells. After publishing the promising results of their experiments, a patent was filed. By 1977, the first full-body scanner was developed. Since then, millions of lives have been saved by the MRI machine. For his contributions, Lauterbur was awarded the Nobel Prize in Physiology or Medicine in 2003.

1

Open the windows

Image: Braden Burson

Yes, you read that right. A sitting US president can’t just get up and open the windows of the White House to enjoy a beautiful day. While there’s no law against it, the protocols state that any action that could pose a security risk to the commander-in-chief must be carefully reviewed and approved by the staff.

2

Go to the cinema

Image: Krists Luhaers

Going to the movies is one of life’s simple pleasures. Unfortunately, if you’re the president, it’s not one of your options. While it’s not officially forbidden, crowded and dark spaces like movie theaters represent serious security risks. Luckily, the White House has its own private screening room, so the president and his family can still enjoy movie night at home.

3

Attend their children’s events

Image: Sincerely Media

You’ll rarely see a president at their kids’ school plays or sporting events. And it’s not because they’re bad parents; it’s because regulations discourage them from attending. With so many people, children, and things happening at the same time, keeping the commander-in-chief safe in those settings is nearly impossible.

4

Buy their own tech devices

Image: appshunter.io

When a new iPhone hits the market, many rush to buy it, but presidents can’t make this decision on their own. Any electronic device, like a smartphone or tablet, could be vulnerable to hacking or espionage. So while presidents can use cell phones, theirs must be secure, vetted, and government-approved.

5

Block people on social media

Image: Julian

And that isn’t the only restriction on cell phones. Presidents who use their social media accounts for official communications are advised not to block people in their official POTUS account, since doing so could be seen as suppressing free speech. On the other hand, they can block users on personal accounts.

6

Go out alone

Image: Warren K. Leffler, Public domain, via Wikimedia Commons

The US president can’t just grab the keys and head out for a walk. Sure, strolls around the White House gardens are fine, but stepping beyond the gates is a different story. Anytime the president leaves the White House, even for a quick walk around the block, the Secret Service must secure the area, plan the route, and provide constant protection. Sounds a little overwhelming, right? But when you’re the commander in chief, safety always comes first!

7

Drive

Image: Jerry Kavan

Ever felt the urge to hop in your car and drive somewhere spontaneously? Well, if you’re the President of the United States, that’s off-limits. Security measures strongly recommend that presidents must always travel in a secure vehicle with a driver and a full security detail. In fact, the last president known to drive alone on the open road was Lyndon B. Johnson (1963-1969).

8

Fly on commercial airlines

Image: The White House, Public domain, via Wikimedia Commons

Just as security protocols strongly discourage the president from driving alone on open roads, flying on commercial airlines is also off-limits. Imagine being hundreds of feet in the air, locked in with strangers; it could be extremely unsafe when you’re the president of the United States. Implementing proper security measures would be too complicated, and with a large presidential staff, there might not even be enough seats for everyone.

9

Accept expensive gifts

Image: Ayana Ames

Presidents receive many, many letters and gifts from the public, but not all of them can be accepted. The US Constitution and federal law require presidents to decline overly expensive gifts, whether they come from foreign leaders or everyday citizens, to prevent any appearance of conflict of interest or corruption.

10

Discard official mail

Image: Wolfgang Vrede

Although it may seem like a harmless, ordinary task, the president can’t just start cleaning out their office or email inbox. All presidential correspondence, physical or digital (even spam!), is considered official government property. It must be processed or archived according to federal records regulations, and discarding anything requires a strict review process.

1

Leaving with your bike in the morning and coming back for suppertime

For a few generations of American kids, a bicycle meant freedom. From the 1940s through the 1980s, children often left home after breakfast with little more than a vague instruction: "Be back before dinner."

Neighborhoods were informal safety nets, and kids were free to navigate them without phones or GPS trackers.

2

Foraging fruit from neighbors’ yards

It was a risky gamble: Picking and eating fruit from unknown plants in your neighborhood could result in a yummy treat…or abdominal trouble.

There was a time when kids freely grabbed berries, apples, or other fruit growing along sidewalks or in neighbors’ gardens. Today, property boundaries have grown, and kids are reminded not to forage without permission.

3

Riding public transportation alone

For much of the 20th century, it wasn’t unusual for children as young as 7 to ride buses, subways, or streetcars alone, especially in large cities like New York, Chicago, and Boston.

Kids commuting to school independently was considered a practical life skill. Parents expect children to learn responsibility through real-world experience , handling routes, change, and unexpected delays.

4

Roller coasters had no belts and no headrests

Do you have memories of rickety rollercoasters? You might correctly remember that earlier rides were thrilling in ways that might give modern safety inspectors pause.

Many of the rides made popular in the 50s relied primarily on simple lap bars and operated with minimal restraints. Designers assumed riders would hold on tightly. Safety rules have evolved drastically since then, and now we have over-the-shoulder harnesses and improved lap restraints.

5

Walking miles to a friend’s house alone

Kids routinely walked long distances across neighborhoods or even between towns without adult accompaniment, guided by landmarks and memory. While this independence helped build confidence, it also reflected a different perception of risk.

6

Not ringing the bell: just yelling your friend’s name from outside

Before texting "I’m here" or coordinating playdates through apps, kids often announced their arrival the old-fashioned way: by standing outside and shouting a friend’s name.

Front yards, sidewalks, and porches acted as social hubs where everyone recognized familiar voices. As concerns about privacy, safety, and structured schedules grew with the years, the casual shout-from-the-street culture slowly disappeared.

7

Spending long days at the beach without adults

Surf culture in places like California and Hawaii, as well as East Coast boardwalk towns, normalized groups of kids swimming, riding the waves, and returning home only at sunset.

Public beaches were seen as community environments where lifeguards and familiar locals provided informal oversight . Today, increased safety standards, liability concerns, and changing parenting norms mean most children visit beaches with close adult supervision.

8

Exploring woods alone

Few children who lived near a forest or rural area could resist the pull to explore it, either alone or with friends. Building forts, climbing trees, and learning their way around nature were influenced by scouting movements and postwar ideas about resilience and independence.

Psychologists today even describe this kind of unstructured outdoor play as beneficial for creativity and risk assessment skills. However, modern concerns about safety, traffic, and environmental hazards have reduced opportunities for unsupervised exploration.

9

Staying home alone or being babysat by older siblings

The rise of the "latchkey kid" became especially visible in the United States during the 1970s and 1980s, when increasing numbers of dual-income households, or single-parent homes, meant children returned home from school to empty houses.

Many kids carried house keys, prepared snacks, and entertained themselves until their parents finished work. Today, research on changing childhood independence shows that unsupervised play and autonomy have significantly declined compared to previous generations.

10

Collecting glass bottles for some cents back

Long before recycling bins appeared on every curb, kids learned about value through bottle returns. Soda and milk bottles carried deposits, and children would collect empties from their own homes or even from neighbors to trade for a few coins at local stores.

It was a first taste of earning money independently, although it often funded candy purchases or comic books.

11

Climbing trees or rooftops, unsupervised

When you are a kid, climbing a tree is decidedly an adventure. There was a time when this was considered a universal childhood activity in America, even encouraged as a playful challenge, since mid-century parenting often embraced manageable risk.

But current safety standards and greater awareness of injury risks have dramatically reduced these kinds of unsupervised play environments.

12

Casually hanging out in abandoned buildings

Another tempting area for children happened to be empty lots, half-built structures, and abandoned buildings . It was difficult to keep out curious and brave kids. This pastime is not entirely eradicated today, although it seems to be teenagers or young adults who engage in it.

13

Riding in cars without seatbelts

For decades, families piled into cars without buckling up, simply because seatbelts weren’t standard equipment. Although basic seatbelt designs existed earlier, widespread adoption didn’t begin until the late 1950s and 1960s.

Even then, many Americans resisted using them, seeing belts as unnecessary or uncomfortable . Laws requiring seatbelt use didn’t become common until the 1980s and beyond, meaning generations of kids grew up riding freely in the back seat.

14

Playing in flooded streets after a storm

Children once treated flooded streets like temporary playgrounds. Heavy rain expanded the available activities for a suburban child. They could splash barefoot through puddles or float makeshift boats down rushing gutters.

Over time, public health campaigns highlighted dangers such as contaminated runoff, hidden debris, electrical hazards, and traffic risks. Enough to scare modern parents!