Mary Follett devoted a lifetime to searching for the true principles of organization which would ensure a stable foundation for the steady, ordered progress of human well-being. That her search was not in vain will be evident to all who read the lectures. Her teaching is not theoretical, but is based on a close study of the practice of a large number of business undertakings. She chose this field of enquiry to supplement her work on local and national government because she realized that the principles which should determine organization are identical, no matter what the purpose which that organization is designed to serve.