In contrast, no states south of Pennsylvania abolished slavery. Many of the southern states did go as far as relaxing manumission laws, which removed restrictions on the right of individual owners to free their slaves. Because of these laws, between 1782 and 1790 individual Virginian slave owners freed as many as 10,000 slaves.
The Industrial Revolution led Europeans to have better military weapons and this allowed small European armies to defeat larger African and Asian forcer when invading territory. This made possible the colonization of the African continent.
