From a previous barstool conversation, I knew that he had graduated from the same university as I had, but he also had a Ph.D. in political science from there. I assumed that he was smart, knowledgeable, provocative, witty, charming, a chick-magnet, but, at best, a mediocre dancer. He had recently started to work for Meta, that Facebook company, doing some sort of computer work that I only vaguely understood.

After some catching up (I had not been in the biergarten for months), he said that there had been three revolutionary tech advances in his lifetime (he is 33) — smartphones, the internet, and ChatGPT. I said that I could understand his inclusion of iPhones and the internet, but that I did not know enough about AI to have an opinion about its status on his list. He said that he used it every day at work and pulled out his smartphone to give me an example of ChatGPT’s marvels.

 He asked what the most important technological innovations in my lifetime were. I had not thought about this before. I did not have an immediate answer. Instead, I said that I knew of many things that were better than when I was a kid, but the improvements seemed to have been incremental or evolutionary not some giant leap in technology. Cars, for example, are better than decades ago. Microwave ovens are nice but not transformative, and so on.

Then I did think of a technological change that had big impact on the spouse. She was writing her Ph.D. dissertation. Her writing until then had been done by hand or on a typewriter and drafts were time consuming and often messy. However, she found that she had access to a clunky new machine that was dedicated to a new task, word processing. Her life had changed, and, of course, that made me realize that one of the important innovations during my lifetime has been the personal computer.

The Meta friend said that he had been told that one advance that had been incredibly important during my lifetime was air conditioning. I agreed. While AC was invented before my days, it became widespread after I was born. And it changed this country tremendously. Places that are now heavily populated would not be, and this has had many consequences.

Our conversation continued to resonate after I left the bar. I told some friends about it, and this led to other interesting discussions. I realized that the Meta friend’s three innovations are, in a sense, not three separate advances. They are intertwined. Smartphones are amazing. They do allow for interpersonal communications that did not exist before, but their real power is that they connect to the internet. Without the internet they would not be so revolutionary. I still think it is too early to know the importance of ChatGPT. Many things have been hyped in our lifetimes that within a decade or so are largely forgotten—iPods and CD and DVD players in the entertainment fields, for example. AI was barely mentioned a few years ago, so I hope it is all right for me to keep on open mind about its importance. However, conceding that I know little about it, I believe that its revolutionary power depends on computer programming and the internet. In other words, one technological advance is at the core of all three of his innovations—the internet.

The discussions about these innovations regularly brought up where to draw the line between revolutionary and evolutionary advances. Smartphones have meant that we can bring a personal computer with us wherever we are. Much of what we can do on these devices, however, we could do before on a personal computer, but not as easily or conveniently. So aren’t personal computers the real revolutionary technology and smartphones only an incremental advance on them?  Possibly, but I do believe that smartphones have been transformative. Their impact on society in such a short time is remarkable. It is hard to remember that iPhones only came on the market in 2007. Imagine the effect on society if smartphones were magically banned. And if ChatGPT were banned? I think few of us would know what the consequences would be.

Many conversations on these topics considered advances that were important to this country throughout its history, not just during the most recent decades. Transportation was a frequent theme. For the first quarter of America’s existence, passenger and freight traffic predominantly went by water. Locations not by the coast or near navigable streams were isolated. The Erie Canal was revolutionary by putting water that could bear passengers and freight where it was advantageous. The result changed the country and made New York City the country’s dominant metropolis.

The innovation, however, that truly began to tie the country together geographically was a network of trains. Distances closed and locations without water transportation were settled more often. We have seen many improvements in transportation since the beginning of the train network. If we hold in mind the major impact of trains, are planes revolutionary or evolutionary? Are jet planes revolutionary compared to the previous planes?

We may not agree on those answers, but I think there would be more consensus on the transformative power of automobiles. That leads to the question of whether the interstate highway system built during my lifetime has been revolutionary.

Another frequent theme in my innovation discussions concerned communications. The telegraph, I believe, produced revolutionary changes in the country. It, like the trains, tied the country together on commercial, informational, and personal levels that the nation had not had before. In a museum a few years ago, I saw the many extras that the New York Herald produced after the assassination of Lincoln. Because of the telegraph, news was in readers’ hands only fifteen minutes or so after the event. It seemed only a bit short of the you-are-there television coverage of Kennedy’s assassination.

If the telegraph was revolutionary, how about telephones? Merely evolutionary or something more?

Radio, which directly entered homes unlike the telegraph, also seems revolutionary. Radio did many things, but it tended to give the country a widespread popular culture that it had not had before. Then along came television. And movies. And cameras.

The discussions of revolutionary technological changes were primed with mentions of smartphones, the internet, and ChatGpt, and the conversations naturally tended to center on what we personally use. There could have been revolutionary advances, for example, in the construction industry, and few of us would have been aware of them. If there have been remarkable innovations in the production of concrete and plywood, for example, I and my discussants were not aware of them. Perhaps surprisingly, none of my New York conversants mentioned the modern skyscraper or elevators, which together transformed cities.

No one suggested any advances in military weaponry although there have been many in my lifetime. (Are drones transformative?) Perhaps most surprising, no one mentioned one of the most important advances of the twentieth century—nuclear power. (The first nuclear bombs were dropped while I was in diapers.) And in the discussions about an earlier America, I am surprised that no one mentioned electric lights or indoor plumbing. However, a friend did maintain that a revolutionary advance in our lifetime was transistors, which transformed electronic devices, and led to computer chips. There is clear path from transistors to the internet, smartphones, AI, and so much more.

We all know that there have been important medical advances in our lifetimes. I certainly am a beneficiary with my artificial joints (three), artificial heart valve (one), and stents (lost track). I doubt that anyone of these in isolation is revolutionary, but the spouse had a broader perspective and said that the advances in medical imaging have been revolutionary.

Some revolutionary advances, such as in medicine and war, are not in the daily sight of most of us. Other revolutionary advances have been so incorporated into society and our lives that they seem invisible. None of my discussants mentioned two that transformed the world during my lifetime: the polio vaccine and birth control. Just think of the world before and after them.

The conversation started by my fellow alum has produced much thought about technology, innovations, society, and history. What would you say are the three most important technological innovations during your lifetime?

Whatever you select, important change can come without revolutionary technologies. We, perhaps, should discuss them, too. I know, for example, that I am extremely grateful for the increases in my lifetime of the availability of pizza.