How did domestic tensions, such as overproduction, unemployment, racism, and the closing of the united states frontier to westward expansion, affect thoughts about imperialism?

Domestic tensions such as overproduction, unemployment, racism and the closing of the American frontier led to imperialism. Americans had long been skeptical of attempts to interfere in international politics and the impact and limits of European interference in American affairs. Yet the shifting nature of American life and the aggressive behavior of European countries such as Germany, France and Germany in acquiring colonies in Africa and Asia served as a model for American politicians and business elites to look for new markets. fueling their imperialistic visions. These ideas were articulated in terms of Alfred Thayer Mahan's promotion of naval power as essential to American power in the world. Increasingly, especially during and after the Spanish American War, the US moved to assert control over nations in the Western hemisphere such as the Philippines, Guam, Hawaii, Cuba, and extend their influence over the Caribbean and parts of Central America.