Earlier I posted that the consequential event of the 20th century was WWI. I was originally going to submit that the assassination of archduke Ferdinand was the most consequential event, but I didn't because it seemed like all the nations were on the path to war, and if Ferdinand wasn't assassinated, something else would've started it anyways (whereas something consequential like the victory of the Bolsheviks was far from guaranteed). But regardless of whether or not WWI was inevitably going to happen, the assassination of Archduke Ferdinand DID set it off, and so you're probably right that that was the most consequential event of the 20th century
The assassination of Archduke Ferdinand... that seemed to lead to so many other things, including WW2 and the development of the bomb.
Earlier I posted that the consequential event of the 20th century was WWI. I was originally going to submit that the assassination of archduke Ferdinand was the most consequential event, but I didn't because it seemed like all the nations were on the path to war, and if Ferdinand wasn't assassinated, something else would've started it anyways (whereas something consequential like the victory of the Bolsheviks was far from guaranteed). But regardless of whether or not WWI was inevitably going to happen, the assassination of Archduke Ferdinand DID set it off, and so you're probably right that that was the most consequential event of the 20th century