It's still a struggle to explain the origin of the forms of modern architecture. We can select key individuals--Wright, Mies, Corbu, and Gropius--and trace their influence on design over the course of a century. Was their influence in shape-making or rule-breaking? If the latter, then we have a better grasp of the eclectic designs of our modern environment. "It feels right" or "I just felt like doing that" become legitimate explanations to a client.