Who were the first people in the western hemisphere?

The first people in the Western Hemisphere are believed to have been Paleo-Indians, who migrated from Asia to North America via the Bering Land Bridge around 15,000 to 20,000 years ago. These early inhabitants spread throughout North and South America, adapting to diverse environments and developing various cultures over thousands of years. Archaeological evidence, including tools and artifacts, supports their presence in regions like Alaska and the Great Plains.