Final answer:
The development in Nathaniel Bacon's 1676 Declaration was caused by Governor Berkeley's refusal to retaliate against Native American attacks, resulting in colonists' frustration and Bacon's pursuit of a rebellion to gain more power for small planters and address their security concerns.
Step-by-step explanation:
The primary cause of the development discussed in the excerpt from Nathaniel Bacon's 1676 Declaration is Governor William Berkeley's refusal to allow retaliation against Native American attacks, which led to frustration among the colonists, particularly the frontier settlers and smaller planters.
Governor Berkeley's policies favored the wealthy elite and in response to attacks on the frontier, he chose to build defensive forts rather than allow offensive attacks against Native Americans. This decision not only angered the colonists who felt threatened but also promised to increase their taxes. As a result, Nathaniel Bacon capitalized on the widespread dissatisfaction by leading an armed rebellion, which sought more power for small planters and retribution against the Native Americans.
Underlying tensions included resentment against the governor's pro-elite policies, land scarcity issues, increasing taxes, and inconsistent protection for the frontier settlers. Bacon's Rebellion represented a power struggle between traditional authority and the demands of disgruntled colonists seeking better representation and security.