The way in which various ideologies can influence one’s world outlook and evaluation of objective evidence is best shown through the following question. This shows how Marxism is far more than just a socio-political theory, as are other ideologies such as liberalism.
Q: Why do nations go to war?
A: Human nature – classical realism
Misunderstanding between peoples – idealism/liberalism
The natural state of man is anarchy and competition – Neorealism
Bad ideas and capitalist systems – Marxism/constructivism
War doesn’t exist – postmodernism