It isn't. The cause of the race problem in America is racism, and I mean white racism. Since the founding of our nation, white prejudice against black people (and other people of color such as Native Americans, Hispanics and Asians, but black people especially) has been, is and always will be dividing our country. White racism is the rot at the core of our nation's social contract. It is white racism, in all its forms, from violent to silent, that has kept us and still keeps us from actualizing E Pluribus Unum, from becoming one people from many.