Douglas Kellner, Professor George F. Kneller Philosophy of Education Chair, Graduate School of Education, UCLA:

"The past decades have witnessed a proliferation of critical theory to the extent that the very concept is a contested terrain. At present, conflicting models of critical theory are utilized by different individuals and groups in various fields of inquiry in different parts of the world.
. . . Critical theory is thus a multidimensional term that continues to take on differing connotations and uses and is embedded in many different disciplines and debates in the contemporary moment."


Link to Dr. Kellner's website and review additional writings on Critical Theory.