In OTL Darwin's ideas were perverted to endorse racial (and in fact class) injustice.
WI The Reconstruction had been more radical and successful. Perhaps somehow Andrew Johnson is persuaded that former slaves are his natural allies against the old ruling class of the South.
Would racism be weaker in Europe?
On the other had might the European establishment fear America more. In OTL in the Ante Belum period many radicals saw America as a whole as a model- much as the left misunderstood the USSR. Of course the existence of slavery was always seen as a blot.
That idea might have been stronger for radicals had slavery been defeated but less attractive to the Imperial ruling classes of Europe
WI The Reconstruction had been more radical and successful. Perhaps somehow Andrew Johnson is persuaded that former slaves are his natural allies against the old ruling class of the South.
Would racism be weaker in Europe?
On the other had might the European establishment fear America more. In OTL in the Ante Belum period many radicals saw America as a whole as a model- much as the left misunderstood the USSR. Of course the existence of slavery was always seen as a blot.
That idea might have been stronger for radicals had slavery been defeated but less attractive to the Imperial ruling classes of Europe