How Much Immigration? Since long before this country became a nation, people were migrating here. In fact the oldest human fossil ever found in the United States, known as Del Mar Man, was dated at 50,000 years old (Soto). The people who made the trek across the Bering land bridge are thought to be the first inhabitants of North America. They belonged to hunting and gathering societies who surely came here in search of food and …showed first 75 words of 1919 total…

…showed last 75 words of 1919 total…