How can we maintain consensus reality, when it has never existed? There are a couple of bubbles of humanity where honesty and skepticism and valued. Everywhere

How can we maintain consensus reality, when it has never existed? There are a couple of bubbles of humanity where honesty and skepticism and valued. Everywhere else, at all moments of history, truth has been manipulated to subjugate people. Be it newspaper owned by polical families, priests, etc.