I find the American way of selecting presidential candidates for the 2 big parties so weird. How did this originate? Is this purely an American creation or does it have roots in anything British or European?
And why do both parties seemingly select their candidate in such a similar fashion? Where does the need to do it this way come from?
It developed out of the need to reform the delegate selection system after 1968, which is a watershed year in American politics for a whole host of reasons. If you are interested, this wiki page on the McGovern-Fraser Commission is a good place to start.