What if Britain abolishes slavery had gone differently?

The largest maritime empire outlaws slavery and starts using its navy to suppress the trade.

If it had gone differently: The biggest naval power keeps slavery legal; abolition loses its first state sponsor and stalls for decades.

The real history on Wikipedia ↗

Later turning points that leaned on Britain abolishes slavery. Change it in the game and the ripples reach all of these.

1. 1861The American Civil War. Without it, The Union splits for good; there is no single continental United States to become the next century's dominant power.