Let's start with Phocas. Without his coup kicking off the last great war of antiquity, Rome and Persia don't pound each other into ruins right before a bunch of barbarians pour out of the Arabian desert. Among other things, this means no Ottoman Empire to employ Maimonides and Sabbatai Zevi, so no Moses Hess mentoring Marx and no critical theory.
Let's start with Phocas. Without his coup kicking off the last great war of antiquity, Rome and Persia don't pound each other into ruins right before a bunch of barbarians pour out of the Arabian desert. Among other things, this means no Ottoman Empire to employ Maimonides and Sabbatai Zevi, so no Moses Hess mentoring Marx and no critical theory.
Removing Mitochondrial Eve from the timeline significantly removes most human-made issues in the modern era.