I think that’s where we differ in analysis. If you had a charismatic leader who was snapped and another that was ruthless who wasn’t snapped, even if you lost 50% on both sides, it could greatly cause an imbalance.
As for a genius or such, it could set progress back by decades or more or they could have produced something that had a positive effect to change the course of their race.
Oh and then you could add these things called “rings” to the bottom of your website to jump to other websites with similar topics.