A History of American Political Theories is a comprehensive attempt to understand the full sweep of American political thought since the founding. Working within the liberal-progressive tradition, Merriam reviewed American political history in its entirety, from the founding down to his own day. He was not out to reduce political thought to a single element such as economics alone; his aim was to encompass the whole of modern social science. The political science of the liberal-progressive tradition has roots and assumptions that were born in this period and nurtured by scholars such as Merriam. The progressive tradition in general and Merriam in particular interpreted the rise of a new science of politics that would be required for the liberal-progressive world view he represented. His work stands at a momentous fork in the road; two great traditions of how American democracy should be understood, interpreted, and analyzed parted company and afterward each went their separate ways. These traditions are represented, respectively, by the founders and the liberal-progressives. There was much at stake in these academic debates, though the consequences were not entirely foreseen at the time. An overview of the authors, works, and general source material covered in History of American Political Theories is impressive. Merriam viewed the study of American democracy as an eclectic activity embracing the broadest definition of the social sciences, with particular emphasis on psychology. Such a transformation required that the social sciences be grouped as a whole rather than fragmented into separate and distinct academic departments.

A History of American Political Theory is a comprehensive attempt to understand the full sweep of American political thought since the founding. Working within the liberal-progressive tradition, Merriam reviewed American political history in its entirety, from the founding down to his own day. He was not out to reduce political thought to a single element such as economics alone; his aim was to encompass the whole of modem social science.

The political science of the liberal-progressive tradition has roots and assumptions that were born in this period and nurtured by scholars such as Merriam. The progressive tradition in general and Merriam in particular interpreted the rise of a new science of politics that would be required for the liberal-progressive world view he represented. His work stands at a momentous fork in the road; two great traditions of how American democracy should be understood, interpreted, and analyzed parted company and afterward each went their separate ways. These traditions are represented, respectively, by the founders and the liberal-progressives. There was much at stake in these academic debates, though the consequences were not entirely foreseen at the time.

An overview of the authors, works, and general source material covered in History of American Political Theories is impressive. Merriam viewed the study of American democracy as an eclectic activity embracing the broadest definition of the social sciences, with particular emphasis on psychology. Such a transformation required that the social sciences be grouped as a whole rather than fragmented into separate and distinct academic departments.

Charles Merriam is scarcely read today, and even among scholars he is probably more often cited than read seriously. His ambiguous position in the study of American democracy is unfortunate. Between the two world wars, Merriman was the doyen of American political science. This was a period when the most formative characteristics of academic social sciences were taking shape, characteristics that were to dominate the remainder of the century. During this period, "science" and "progress" became virtually synonymous in the social sciences. Between the two world wars, the liberal progressive critique of America's founders, a critique that included scholars such as Woodrow Wilson, Charles Beard, and others, became the orthodoxy of a new political science. The heart of that critique, insofar as it turned on methodological questions of how to study American government, was very much the work of Charles Merriam. Anyone who seeks to understand why that period was so pivotal in the interpretation of American democracy must necessarily study Charles Merriam and his influence. His work represents the first comprehensive effort by a scholar in the liberal-progressive tradition to survey the entirety of American political thought.

To read Merriam's political essays and writings is to read a political theory that the behavioral tradition would come to label as "normative." His essays included insightful interpretations of Hobbes and Rousseau in European political philosophy as well as an earlier work tracing American political thought from the founding to the Civil War. This is a fundamental work for scholars working in the liberal-progressive tradition.