Which school of thought in psychology believes that people can freely choose to live more creative, meaningful, and satisfying lives?

humanism

Explanation:

Humanism -

The term humanism was first given by Friedrich Niethammer, in the early 19th century.

It focus on the individuality, collectiveness, creativeness of the human being, is referred to as humanism.

According to humanism, is decribes the act of freedom, progress, which can be used for the development and promotion of any individual in the world.

Hence, from the given information of the question,

The correct answer is humanism.