I don't know if there are short words for this, but seems to me that some people generally assume that "things, left alone, naturally improve" and some people assume that "things, left alone, naturally deteriorate".

The first option seems like optimism, and the second option seems like pesimism. But there is a catch! In real life, many things have good aspects and bad aspects. Now the person who is "optimistic about the future of things left alone" must find a reason why things are worse than expected. (And vice versa, the person who is "pessimistic about the future of things left alone" must find a reason why things are better.) In both cases, a typical explanation is human intervention. Which means that this kind of optimism is prone to conspiracy theories. (And this kind of pessimism is prone to overestimate the benefits of human actions.)

For example, in education: For a "pessimist about spontaneous future" things are easy -- people are born stupid, and schools do a decent job at making them smarter; of course, the process is not perfect. For an "optimist about spontaneous future", children should be left alone to become geniuses (some quote by Rousseau can be used to support this statement). Now the question is, why do we have a school system, whose only supposed consequence is converting these spontaneous geniuses into ordinary people? And here you go: The society needs sheeps, etc.

Analogically, in politics: For some people, the human nature is scary, and the fact that we can have thousands or even millions of people in the same city, without a genocide happening every night, is a miracle of civilization. For other people, everything bad in the world is caused by some evil conspirators who either don't care or secretly enjoy human suffering.

This does not mean that there are no conspiracies ever, no evil people, no systems made worse by human tampering. I just wanted to point out that if you expect things to improve spontaneously (which seems like a usual optimism, which is supposedly a good thing), the consequences of your expectations alone, when confronted with reality, can drive you to conspiracy theories.