At the turn of the 20th century, the world of chess was hit by a schism. (Yes, we're talking about a schism in chess. This is gonna be one exciting profile!)
On one side there was Siegbert Tarrasch, who led the classical school. Tarrasch believed that the center of the board should be controlled by pawns. Aron Nimzowitsch, on the other hand, led the hypermodern school. He thought the center doesn't need to be controlled by pawns. (Oh, now this is getting real!)
They hated each other's guts.
Tarrasch called Nimzowitsch "bizarre" and "unaesthetic". Nimzowitsch called Tarrasch "mediocre" and "dogmatic". (These are fighting words!) The two spent much of their lives antagonizing each other, trying to prove the other one wrong.
Who won? At the end, both can be called founding fathers of modern chess theory, but Nimzowitsch is the one usually considered the greater contributor. On the other hand, Tarrasch is the only one who competed for the world title, losing to Emanuel Lasker in 1910.
In our eyes, Nimzowitsch is the clear winner. Why? He spent his life as a Jew, while Tarrasch converted out...