One of those thoughts that creep unbidden into your, or at least, my, mind in that half-state between sleep and waking . . .
In what ways different do you think the World would be in 2015 if, 150 years ago, the Confedaracy had won the American Civil war?
A staple subject for alternative histories or Uchronia as I believe it's sometimes referred to.
There are a pair of books edited by war historian john Keegan which deal with this and other what if's called ''What If?''
New Scientist devoted a whole edition to the ''what if's?'' of science a few years ago.
There is an Alternative history site with an amusing feature on How celebrities and the famous became Catholic priests in an alternative history......so you have Father Billy Graham, Father Bill Clinton, Father Richard Dawkins, Father Eminem etc.
If the confederates had won the war? I think it would have led to a real American aristocratic class, the confederate president declaring himself as an Emperor, poor whites becoming a serf class and slavery extended to Native Americans.