The answer is 49, hope you got 100 on your test
♥ Estimated 50,000
♥ Till to this day no one knows the EXACT amount. <span />
If I understood your question correctly, then the answer is "it depends". Sometimes, individuals have a large impact on starting a war (think World War I where one individual caused the war to start), other times groups of people have also important roles in starting a war (think World War II).
If you are talking about the first settlers in North America then they were pursuing their faith. They came to north america so that they could worship there God freely without being oppressed.