"Definition of school of thought
: a way of thinking"
https://www.merriam-webster.com/dictionary/school%20of%20thought
"a set of ideas or opinions that a group of people share about a matter:"
https://dictionary.cambridge.org/dictionary/english/school-of-thought
"An opinion subscribed to by some connected or arbitrary group
The way in which a person tends to think based on experience, beliefs, learning and reason
A group or sect holding a particular religious belief
A theory or attitude that acts as a guiding principle for behavior"
https://www.wordhippo.com/what-is/another-word-for/school_of_thought.html
"A school of thought, or intellectual tradition, is the perspective of a group of people who share common characteristics of opinion or outlook of a philosophy, discipline, belief, social movement, economics, cultural movement, or art movement."
https://en.wikipedia.org/wiki/School_of_thought