While the effects are definitely post-1900, the POD is equally clearly pre-1900. That's why I put this here. Moderators: if this doesn't work with the rules, please move to the post-1900 venue.
Suppose that for any of a variety of reasons, Joseph Ruggles Wilson, father of Woodrow Wilson, remained at Jefferson College (now Washington and Jefferson) in Canonsburg, PA. Son Thomas Woodrow Wilson would probably (all else being equal) have been born there in late 1856.
So: how does this affect the life of Woodrow Wilson? Would he have chosen an academic career yet still ultimately gone into politics?