What were two reasons slavery spread so rapidly in the American Colonies

They increased because the demand for crops raised and people needed labor.

Explanation:

hope this helps :^)

answer; i believe the first answer to be (independent; /// and the second answer is (french); good luck

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.