Perennialism Philosophy Of Education Do You Capitalize These Words In An Essay: Existentialism, Perennialism, Essentialism And Progressivism?

Do you capitalize these words in an essay: existentialism, perennialism, essentialism and progressivism? - perennialism philosophy of education

These are all the philosophies of education.

For example: "I accept the philosophy of progressivism ..."
"The Education of John Dewey model is based on the progressive base"
"These existentialists believe that ..."

I am confused whether to use when they are no longer or not activated.