There is no American or human being in the United States or the world today alive 150 years ago. This means that American citizens today have inherited one of the richest territories in the world from their ancestors who inhabited the land before them. No other people have inherited such a wealthy and geographically diverse territory. In 1990, for example, the buying power of all Americans was $4.27 trillion. By 2009, that figure increased to $10.72 trillion. Apart from Native Americans, people of Black African descent and people of European descent are the oldest inhabitants of the United States, occupying the land together for almost 400 years. Both groups comprise at least 80% of the total population of the country. This paper argues that unity between these two racial groups is responsible for their economic success and leadership position in the world. The paper goes on to claim that four major factors have been responsible for the unity between Africans and Europeans in the United States : (1) Land/Territory; (2) Blood/Genes; (3) Religion (mostly Christianity); and Language (English).