I just want to point out this is more or less what was called conservatism for a long time, before it got more radical. If you look up e.g. Edmund Burke's works, you find precisely the attitude that civilization is worth preserving, yet it is something so fragile, so brittle, radical changes could easily break it. So the basic idea was to argue with the progressivist idea that history has a built-in course, going from less civilized to more civilized, and we will never become less civilized than today, so the only choice is how fast we progress for more, Burke and other early conservatives proposed more of an open-ended view of history where civilization can be easily broken. Or, a cyclical view, like empires raise and fall. Part of the reason why they considered civilization so brittle was that they believed in original sin making it difficult for human minds to resists temptations towards destructive actions, like destructive competition. An atheist version of the same belief would be that human minds did not evolve for the modern environment, the same destructive competitive instincts that worked right back then could ruin stuff today. To quote Burke: "Society cannot exist, unless a controlling power upon will and appetite be placed somewhere; and the less of it there is within, the more there must be without. It is ordained in the eternal constitution of things, that men of intemperate minds cannot be free. Their passions forge their fetters."

This moderate view characterized conservatism for a long time, for example, National Review's 1957 takedown of Ayn Rand was in this Burkean spirit.

However throughout the 20th century, conservatism has all but disappeared from Europe and and it turned into something quite radical in America. Far more than a civilization-preserving school of ideas, it became something more radical - just look at National Review now and compare it with this 1957 article. I don't really know the details what happened (I guess the religious right awakened, amongst others), but it seems conservatism in its original form have pretty much disappeared from both continents.

Today, this view would be more characterized as moderate e.g. David Brooks seems to be one of the folks who still stick to this civilization-preserval philosophy.

My point is, you probably need to find people who self-identify as moderates and test it on them. e.g. moderatepolitics.reddit.com