How did the practice of enslaving people evolve in the colonies?

It was through the Settlers.

Explanation:

The settlers in the country were the first to start the practice of slavery. They brought with them slaves to the country to help with their farm and daily activities.

The settlers involved in this practice were prevalently from Spain and Portugal. This made some Americans to adopt the practice which eventually led to its evolvement in the colonies.

this article will :

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.