Perspective Spectrum and School of Thought
Perspective, school of thought or ideology has a wide range (spectrum). For example between conservative (averse to change) vs liberal (willing to change) -where each side might argue the opponent side has oppenent agenda. Or between Realist (Engineering/Business) vs Futurist (Art/Humanities).
Carl Ritter (b1779) is a founder of modern geography, he bring a new perspective on how we see human on earth, which mainly from environmental determinism point of view.