Sorry to be a bit pedantic, but reality exists independent of belief or acceptance. However, a belief in whether or not a person can change that reality at some future point, I think is a more accurate description of the quality you're describing.
It can be similarly argued that the modern income/opportunity distribution owes its continues existence to the fact that enough people believe that it exists and is lawful.
> When you go too far up, abstraction-wise, you run out of oxygen. Sometimes smart thinkers just don’t know when to stop, and they create these absurd, all-encompassing, high-level pictures of the universe that are all good and fine, but don’t actually mean anything at all.
I'm using the word in that sense of "The reality is that I can't afford to buy a Ferrari"; it's (sadly) true, but it could change in the future.