Objectivity is presumably the opposite of schizophrenia.
Which means that it is nothing but acceptance of everybody else’s notion of reality. But nobody’s perception of reality is the same as everybody’s notion of it, which means that the most objective person is the real schizophrenic.
It is hard to get beyond the accepted beliefs of one’s own age. The first man to think a new thought advances it very tentatively. New ideas have to be around a while before anyone will promote them hard.
In their first form, they are like tiny, imperceptible mutations that may eventually lead to new species. That’s why cultural cross-fertilization is so important. It increases the gene-pool of the imagination.