The book introduces the reader to western ethics as a subject, along with its three standard subdivisions. Although the book is written with university students, policymakers, and professionals in mind, the book is lucid enough to be accessible to most adult readers. The book begins with introductions to the basics of ethics. These chapters are meant to provide the reader with the background knowledge necessary for understanding the more technical chapters on metaethics, normative ethics theories, and applied ethics, the three well-known subdivisions within ethics. The chapters that follow take up core ethical issues from each of these areas. The sections focus on explanation and a critical understanding of the ethical issue. The chapters also have examples, cases, and exercises to encourage critical thinking and to enable the reader to grasp the issue better. The book has tried to bring contemporary issues, such as ethics of human organ transplantation, and contemporary theories, such as Amartya Sen’s concept of Justice and Martha Nussbaum’s Capabilities Approach, to engage the readers with ethics in the real world. The book concludes with applied ethics, but with the example of ethics of artificial intelligence. The aim is to keep ethics as a future-driven activity and to emphasize the need to understand the real-world ethical situations and dilemmas that will affect the stakeholders all around the world in the coming years as artificial intelligence and data-driven technologies change our everyday life.