Do you have an example of an ideology for which most people in the world agree it produced more good than harm? Why should I trust an ideology? Why should I bu

Do you have an example of an ideology for which most people in the world agree it produced more good than harm? Why should I trust an ideology? Why should I buy into a fixed set of doctrines? Supposedly, an ideology is not a religion, so faith shouldn't be an argument. Adopting a fixed view of the world doesn't allow me to be pragmatic. It doesn't allow me to adapt in a dynamic and ever changing world. And most of the times something isn't absolutely bad or good, but it depends on a set of factors. Immigration can be good in some circumstances and bad in other. Taxes can be good in some circumstances and bad in other. I might value both ideas which can be on the left or the right side of the political spectrum. Usually ideologies are promising some kind of Paradise on Earth and saving something. But the results are mostly loss of freedoms which is justified by the supposedly "greater good". Also, ideologues and activists doesn't produce anything of value for society, they just are into convincing people into following their ways. While they are benefiting greatly from it.