Evaluate the extent to which the environment and/or knowledge of the environment affected
imperial expansion in the period circa 1450–1750.

Imperial expansion was largely triggered by the quest of the imperial nations to want to know more about the unknown world and envoirment. The imperial nations took sea-faring adventures in order to reach places they never had knowledge of and in so doing were able to colonize these places. Also, the Fear of going beyond their known envoirments left the colonized nation limited in their knowledge of the world at large making them easier to colonize.

i think its provide for the common defense

it took two men to wrestle rome back from chaos and turn a republic into an empire. in the first century bc, rome was a republic. power lay in the hands of the senate, elected by roman citizens. but the senators were fighting for power between themselves.