During the French Revolution, ideals like “Liberty, Equality, and Fraternity” served as clear guiding principles. But today, such definitive banners are harder to see—opinions are fragmented everywhere, and even scientific data can lead to completely opposite conclusions depending on interpretation.
We’ve entered an era where people are no longer searching for a universal truth to believe in, but rather, something they can personally accept and make sense of. 
Coming from a libertarian perspective -- I personally have developed certain "universal principles" about personal liberty and freedom that have remained basically unbroken for a long time. World events come and go, some tend to confirm my beliefs, others can be challenging -- principles of "free association" in particular can be tough to maintain when there's a global pandemic...
At most times and places in human history there has been tension between the "conventional" and "heterdox" worldviews -- this tension is, I think, mostly productive. Heterodox pushes against aspects of the conventional worldview that don't fit objective reality anymore, then "heterodox" goes too far and you get Charles Manson / Donald Trump / cancel culture, and we need to hew back to "conventional" again.
