St. Thomas More's beliefs based on Moral/Ethical living..?

hello, my task is to research st. thomas more and relate his ideas/actions to the thinking in our RELIGION TEXTBOOK: "in search of the good", which deals with stages of moral development, conscience, kingdom of god, human dignity, justice, etc. Basically, I need help as to where i can find what More believed in or has done which could help me better undersatnd moral/ethical living based on Catholicism. Thanks!