summarizing the main ideas presented by Immanuel Kant in his work “Fundamental Principles of the Metaphysics of Morals” as discussed in Chapter 6 of the book “Doing Ethics.”

 After reading all of Chapter 6 of book Doing Ethics, please write a short, objective summary of 250 which summarizes the main ideas being put forward by the author in this selection of the document “Fundamental Principles of the Metaphysics of Morals” by Immanuel Kant (starting on page 146)