Neatorama: It seems like a necessary and not terribly difficult thing to do—make sure someone is always running the country. But it took U.S. lawmakers nearly 200 years to get most of the kinks out of the presidential succession process. Not until the 25th Amendment to the Constitution was passed in 1967 was the procedure for replacing an incapacitated president clarified. So what happened before that? Well, the government sort of made things up as it went along.