This introductory chapter introduces the theme of this book, which is modern international human rights law. The book traces the unprecedented expansion in the internationally recognized rights of all people with acceptance of a human rights dimension to the quest for international peace and security following the formation of the United Nations in 1945. It examines the International Bill of Rights and the regional protection of human rights, and describes several human rights organizations including the Organization of American States and the African Union. The book discusses different types of rights, including the right to life, the right of liberty to persons, and the right to work, and also evaluates the monitoring, implementation, and enforcement of human rights laws.