This document defines ethics and business ethics, discusses unethical behavior and its common reasons and root causes. It notes that business ethics is the application of ethical principles to business decisions and actions. Unethical behavior lacks moral principles and adherence to proper conduct. Common reasons for unethical behavior include pressure, uncertainty about right and wrong, and self-interest. Psychological traps like obedience to authority, need for closure, and false consensus effect are identified as root causes. Examples of unethical behaviors in the workplace are also provided.