Thinking About Thinking is a work of political sociology. The premise of the book is that one can create a general sociological theory of ideology and apply that general theory to the situation of the United States in the Twenty-First Century in order to explain the remarkable and threatening political ideological divide between supporters and opponents of former president Donald J. Trump. Thinking About Thinking delivers the one thing that has been missing in our national conversation: a theory-based and evidenced explanation of the contemporary American political divide, specifically the divide between the supporters and opponents of Donald J. Trump. It is the single indispensable source for understanding this divide and its social, economic and technological bases.