[grujicd]

You can also wonder what would happen if Gavrilo Princip missed Franc Ferdinand in 1914? Single bullet could completely change world history. Would Austro-Hungary declare war to Serbia over some other cause? Or would some other incident start war between other two countries, leading to the same worldwide havoc? Some say that history is inevitable since it's result of massive forces which are similar to laws of nature. I'm not that sure. Tensions can be defused, diplomacy might work, some other incident could lead to different kind of conflict at different location. What is pretty much sure is that there would still be wars since they seem to be inevitable.

But if that one shot missed, perhaps we wouldn't have WW1, and without WW1 there wouldn't be WW2 as circumstances would be completely different. Was there a single development as small as firing a single bullet that affected world's history this much?

[greedo]

Nationalism was coming alive as a powerful political force in the second decade of the 20th Century, so it's hard to estimate what would have happened had Princip missed. Odds are the Black Hand would have simply kept trying to kill the King as a means of obtaining independence.

Even had the Balkans not been the powder keg, I think there was not much doubt that there would be a conflict on the Continent between a unified Germany and either Russia or France. Germany was trying to compete for colonies, for resources, and even without the web of treaties that lead to WW1, would have found a reason to flex their muscle.

[dotnet00]

IIRC all of humanity outside of Africa has gone through a tight population bottleneck at some point, such that a massive portion of human history can probably trace its root to a group of early humans managing to survive a certain encounter, none of which would've existed if they hadn't survived.

[hollerith]

The severe bottleneck 800,000 years ago includes the ancestors of all modern Africans.

[dotnet00]

Yeah was just coming back to edit after reading up on it. A bottleneck from 100k to 1000 human ancestors ~800,000 years ago for ~100,000 years.

https://www.science.org/doi/10.1126/science.abq7487

"Population size history is essential for studying human evolution. However, ancient population size history during the Pleistocene is notoriously difficult to unravel. In this study, we developed a fast infinitesimal time coalescent process (FitCoal) to circumvent this difficulty and calculated the composite likelihood for present-day human genomic sequences of 3154 individuals. Results showed that human ancestors went through a severe population bottleneck with about 1280 breeding individuals between around 930,000 and 813,000 years ago. The bottleneck lasted for about 117,000 years and brought human ancestors close to extinction. This bottleneck is congruent with a substantial chronological gap in the available African and Eurasian fossil record. Our results provide new insights into our ancestry and suggest a coincident speciation event."