It affected them negatively, the idea of Manifest Destiny is that God has given us as explorers the right and destiny to take any land we discover as our own. this, of course, led to the forcing of native peoples to leave their land in order for the invaders to live there.
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In the United States, divided government describes a situation in which one party controls the executive branch while another party controls one or both houses of the legislative branch.
The person who perfected the steam engine is the very known inventor and early-day scientist James Watt. His work on the steam engine made it widely used and one of the most profitable and turn-overable areas of the industry during those times.