What is the branch of philosophy that deals with behavior standards called?

The branch of philosophy that deals with behavior standards is known as ethics. Ethics encompasses the principles and guidelines that dictate what is considered morally right and wrong, guiding individuals in their decision-making and interactions within society. It addresses questions about human conduct and the standards that govern our behavior in various contexts, including professional fields, personal relationships, and societal norms.

In a broader sense, ethics can include specific areas such as medical ethics and bioethics, which focus on ethical issues in the healthcare field and biological research, respectively. However, these are subsets within the overarching field of ethics. Therefore, the term 'ethics' is most appropriate when referring specifically to the general framework that defines behavior standards across all aspects of life.

Moral philosophy is closely related and often used interchangeably with ethics but is seen as a historical branch of philosophy that examines the nature of morality itself, rather than serving as a comprehensive set of behavioral standards. Thus, while moral philosophy explores ethical reasoning, the term ethics more directly refers to the established standards and principles of behavior.