USA HISTORY

Detailed explanation-1: -Settlers killed off huge numbers of people in conflicts and also by spreading disease, which reduced the indigenous population by 90% in the century following Christopher Columbus’s initial journey to the Americas and Caribbean in 1492.

Detailed explanation-2: -When the Europeans arrived, carrying germs which thrived in dense, semi-urban populations, the indigenous people of the Americas were effectively doomed. They had never experienced smallpox, measles or flu before, and the viruses tore through the continent, killing an estimated 90% of Native Americans.

Detailed explanation-3: -European colonization of North America had a devastating effect on the native population. Within a short period of time their way of life was changed forever. The changes were caused by a number of factors, including loss of land, disease, enforced laws which violated their culture and much more.

Detailed explanation-4: -Indigenous people both north and south were displaced, died of disease, and were killed by Europeans through slavery, rape, and war. In 1491, about 145 million people lived in the western hemisphere. By 1691, the population of indigenous Americans had declined by 90–95 percent, or by around 130 million people.