Final answer:
Trade with native populations contributed to political instability in the American colonies during Bacon's Rebellion through restrictions on access to land, conflict with indigenous tribes, and the shift from indentured servitude to slavery.
Step-by-step explanation:
The trade with native populations contributed to political instability in the American colonies during Bacon's Rebellion in several ways. First, Governor William Berkeley's policy of signing treaties with various local Native peoples to maintain peace was seen by Bacon and his followers as an obstacle to their access to land. They believed that all Native peoples were preventing them from owning tobacco farms and pursuing economic opportunities.
Second, the rebellion itself was sparked by an attack by Susquehannock warriors on Virginia's frontier. Bacon and other Virginians, without the governor's approval, attacked the Susquehannock and initiated a civil war. This conflict between the colonists and the indigenous tribes further destabilized the political situation in the colonies.
Lastly, the aftermath of Bacon's Rebellion led to a shift from indentured servitude to slavery. Virginia's leaders reasoned that relying more on slavery would result in fewer men competing for the available land. This rapid increase in the slave population and the implementation of Bacon's Indian policy deepened the divide between colonists and Native populations and intensified the tensions between them.