What is described as a set of values, ideas, and opinions of an individual or group?

The term that is best described as a set of values, ideas, and opinions of an individual or group is philosophy. Philosophy encompasses the fundamental beliefs and principles that shape how individuals or groups understand the world and their place in it. It involves critical thinking and the exploration of different concepts, encouraging the evaluation of existence, knowledge, morality, and human behavior.

In contrast, ethics refers specifically to the moral principles that govern a person's or group's behavior, focusing on what is considered right or wrong. Doctrine typically refers to a set of beliefs held and taught by an organization, often in a religious or ideological context, and may not encompass the broader range of values and ideas that philosophy does. Lastly, theory usually relates to a systematic explanation of phenomena or events, based on principles that can be tested or researched, rather than a comprehensive collection of beliefs and opinions.