I'm not aware of any ideology where "doctrinaire" belief does not require some level of self imposed blindness. Here's a few more, and I'll be equal opportunity

I'm not aware of any ideology where "doctrinaire" belief does not require some level of self imposed blindness. Here's a few more, and I'll be equal opportunity: - There is little evidence that free markets can drive serious innovation. Nearly all the high tech of the 20th century is a product of state research labs, state funding, or state enforced monopolies like Bell. This is true up to today e.g. Tesla and SpaceX are heavily state supported. - There is a ton of evidence that IQ and temperament are heritable and that parenting styles (excluding extreme abuse) don't matter that much. - Infinite exponential growth on a finite planet is impossible. Space migration may be possible but will not change this since e.g. Mars is too far from Earth and travel is too costly for fundamental physical reasons. Eventually supply side (ecological) or demand side (declining birth rates, diminishing marginal utility) will end the growth era. (Personally I think we are almost there as evidenced by near zero interest rates.) - The entire war on drugs is built on very bad science, or no science, and evidence from cases like Portugal's heroin decriminalization show that harm reduction works better even for hard drugs. - Most "alternative" medicine fares no better than placebo. ... and so on. Evidence is not why people believe things. For the most part, Ideologies (tm) are social/tribal membership signals not attempts to actually and honestly understand the world. Unfortunately we then proceed to reason from these shibboleths; to make decisions based on things that amount to little more than intellectual football t-shirts and special handshakes. For a very long time I've seen this as humanity's greatest weakness.