No WW-I would probably have also prevented rise of Nazis and WW-II as it eventually unfolded. The next great conflict would more likely have been between Soviets and western Europe, and as that developed (possibly around 1950), quite plausible that an isolationist America under perpetual Republican rule would have stayed out. Depression of 1930s possibly just a recession.
Difficult to guess the future of Japan without European allies in 1930s, possibly a slower expansion or none at all. Possibly a communist China by 1950, but more in orbit of Soviets? Also likely a slower evolution of post-colonial world. Islam considerably less militant? Decline of traditional culture on a slower pace?
Nuclear weapons? No great rush to develop, possibly not invented at all.
Nobody can say, unless God runs an alternate earth somewhere to find out. An important point, none of us would be alive, different histories of our ancestors, different fates, different offspring. People who were alive probably turning out differently. Churchill not a famous leader, FDR a minor figure, Stalin alive into 1960s? and hitler never heard of. Beatles? Rolling Stones? Probably not. We cannot really guess what might have replaced all that, and iconic events of more recent years, 9-11 for example, Obama, Biden, very unlikely figures without the collapse of traditional culture and religion.
Good post.
No WWI would have probably kept alive a “golden age” for much of the world for many decades—perhaps lasting until today—with much less war related technology and much weaker central governments.
But—beyond that—the killing and maiming of an incredible number of young men could have been avoided.
You cannot put a value on that—it is priceless.