This document provides an introduction to bioethics. It defines ethics as a set of moral principles concerning rights, obligations and ideals that guide judgments of good and bad. Bioethics applies ethical principles to issues in medicine and life sciences. The document discusses how ethics relates to morals and values, and gives examples throughout history where bioethics became important, such as the Tuskegee Syphilis Experiment and Nazi human experimentation. Basic ethical principles like beneficence, non-maleficence and autonomy are introduced. The document emphasizes that there are no absolute answers in ethics, but rather weighing different perspectives and justifications is needed to make well-reasoned decisions.