In Playing with Reality: How Games Have Shaped Our World, neuroscientist Kelly Clancy examines how the frameworks of games have affected myriad aspects of human society, and how more recently game theory and related ideas have led to damaging and even ruinous policies that continue today with the mindless (pun intended) push to make everything AI.

Playing games leads our brains to produce dopamine, and games with uncertainty function as variable reward systems, increasing those dopamine surges and further encouraging us to keep playing. Thus we see evidence of games going back to ancient Babylon (the Royal Game of Ur), Egypt (Senet), and Africa (mancala), with games often used as tests of intelligence or readiness for a position as a leader or even as royalty. Such games often included substantial elements of chance, including the progenitors of dice, which led to early calculations of probabilities well before the Europeans started to figure this stuff out in the wake of the Renaissance. Games have evolved over time in complexity, and as they have developed, they have further permeated our non-playing world.

Clancy sets the stage by giving that history and an explanation of what happens in the brain when we play games, including games of chance and games of strategy, and then moves into the more sordid history of games affecting … well, history. She goes into the story of Kriegsspiel, an early wargame that was first developed by a Prussian nobleman two hundred years ago, and after several decades found its way into military leaders’ hands, where it became a tactical training tool for officers in the Prussian and later German armies. Clancy connects it to the Germans’ early successes in World War I and the use of the Blitzkrieg strategy in World War II, both as a way to explain how we can use games to learn and to think more flexibly, as well as how games can lead to unexpected and even tragic outcomes when used without guardrails.

Game theory ends up the main character of the second half of Playing with Reality, as Clancy points out that the way game theoreticians took over much of economic teaching, dovetailing as it did with the myth of the ‘rational’ man, led to decades of policy failures across the world that were based on a set of faulty assumptions about how people would act. (She did not, unfortunately, mention the “it’s time for some game theory” meme.) This idea of “economic man” or “rational man” had a stranglehold on economic instruction throughout the world for decades, well past the point where folks like Daniel Kahneman and Amos Tversky had published research showing that people are in fact not rational, and often fall prey to cognitive biases, leading to results you won’t predict if you’re stuck in the standard model.

Clancy saves some of her particular ire for the AI gold rush and the grifters pushing it, cautioning that these LLMs are not actually exhibiting ‘intelligence,’ and that there’s danger in treating “language like a game without meaning.” Much of what she says about these energy-devouring scams could have been written this week, even though the book itself was first published last year; she decries the lack of regulation or even common sense in many of the uses of so-called AI, and the history of the overapplication of games and game theory to real-life – often treating the world as a zero-sum game, when it is manifestly not – shows how easily we can destroy the world by thinking in those terms. (She cites a specific example from the Cold War, where one Soviet engineer decided to ignore an alarm that a U.S. ICBM was heading towards Russia; the alarm was false, of course, but that one person’s decision, against the ‘rules’ of the game, saved us from World War III.)

Clancy’s focus is on how games are intrinsic to humanity, how we’ve tried to model reality in our games and then taken the games and tried to apply them back to reality, with mixed results if we’re being kind. Mathematician Marcus du Sautoy takes a different approach in his book Around the World in 80 Games: A Mathematician Unlocks the Secrets of the Greatest Games, which may not actually get to eighty games (and certainly not the greatest ones) but does at least provide some interesting histories of games outside of the western canon, truly going around the world to explain the origins and uses of games in Africa, South America, and across Asia. The book offers some superficial looks at the math behind some of these games, but it’s scant, and it’s hard to get away from du Sautoy’s pie-eyed optimism around AI, which he seems to view as an unmitigated positive that will take drudgery from our lives and allow us to play more games.

Du Sautoy succeeds most when he gets a little deeper into the specifics of a game, such as the analysis of which properties are the best ones to buy in Monopoly (the orange ones above all), or the history of tarot cards (which had nothing to do with the woo for which various charlatans have adapted the game), or the stories of games from non-European cultures that were unfamiliar to me, like Sudan’s Dala – many of which have been ‘solved’ by mathematicians, for better or for worse. Du Sautoy writes very much like a mathematician, so when he’s in the weeds, he’s actually clearer and his passion is palpable, but when he starts veering off into philosophy or his almost religious belief that AI is going to save the world, not only is the prose harder to read, but he’s clearly out of his depth.

Both books quote many of the same sources on the philosophy of games, including Bernard Suits’s The Grasshopper and C. Nhi Nguyen’s Games: Agency as Art, which makes their tonal differences more stark. Clancy is the realist here, someone who certainly seems to like games but understands their limitations as models for society as a whole, while du Sautoy is the Panglossian dilettante whose life of relative privilege – his grandfather ran the publisher Faber & Faber and his godmother was T.S. Eliot’s wife Valerie – has perhaps blinded him to the realities of daily life for most people. Du Sautoy does cover more specific games, if that’s where your interest lies, while Clancy has much more to say about games as a whole.

Next up: Staying on a theme, I’m reading Philip K. Dick’s pulpy The Game-Players of Titan.