The Mayans were right, as it turns out, when they predicted the world would end in 2012. It was just a select world: the G.O.P. universe of arrogant, uptight, entitled, bossy, retrogressive white guys. [...] Instead of smallpox, plagues, drought and Conquistadors, the Republican decline will be traced to a stubborn refusal to adapt to a world where poor people and sick people and black people and brown people and female people and gay people count.