To perform an "ackshually", the Eugenics War was mainly the results of retards like Bob, but who actually had skills. Namely they knew a lot about genetics, gene splicing, obstetrics, and a lot of political autism. These people wanted to elevate and create a superior breed of man, and made a program that made dozens of Supermen. These supermen were more superior in will, charisma, and intelligence. Not only that, but they were physically perfect as well, having superior strength and endurance.
But these supermen, called Augments, looked at their creators and humanity and went "yeah we're better than you fuckers". So they were able to take over several different countries, the most successful of them being Khan Noonien Singh, who at one point ruled an empire that rivaled Genghis. Then humanity either rose against them, the Augments began to war with each other (superior seed breeds superior ambition), and by the end of it, 30 million were dead, Khan fled to space with his die-hards, and the remaining Augments either were publically executed or went into hiding.
This is why the Feds hate gene-splicing and eugenics by the way. The fact that Bob has the audacity to pretend he's a fan when the show violently rejects his fascist eugenics bullshit is telling he AT BEST saw a couple of the movies.
It's funny they completely ignore that Prosperity Gospel was a thing. Probably because mentioning what the prior people actually wanted kills the grift and destroys the fake and gay image they want to project.
It was. The Eugenics War (it's called that by the way) caused millions of deaths. It also set up World War 3, since a LOT of the countries absorbed by Khan as well as the remaining communist bloc combined into what became known as ECON. Basically them and NATO went thermonuclear, and then after the exchange, conventional. It killed over half a billion people, spawned the nastiest terrorist in the franchise, and traumatized the Earth into unifying after ~25 years of bloodshed and collapsed nations.