It’s been a while since I read about this, but I think your slavery example might be a bit misleading. If I’m not mistaken, the movement to abolish slavery initially only gained serious steam in the United Kingdom. Adam Hochschild tells a story in Bury the Chains that makes the abolition of slavery look extremely contingent on the role activists played in shaping the UK political climate. A big piece of this story is how the UK used their might as a global superpower to help force an end to the transatlantic slave trade (as well as precedent setting).
It’s been a while since I read about this, but I think your slavery example might be a bit misleading. If I’m not mistaken, the movement to abolish slavery initially only gained serious steam in the United Kingdom. Adam Hochschild tells a story in Bury the Chains that makes the abolition of slavery look extremely contingent on the role activists played in shaping the UK political climate. A big piece of this story is how the UK used their might as a global superpower to help force an end to the transatlantic slave trade (as well as precedent setting).