willful ignorance

Here is the biggest danger of Trumpism
This reluctance to actively consider something that causes cognitive dissonance or necessitates reappraisal of our actions is reprehensible. This reluctance is the death knell of countless species and ecosystems on Earth that we have come to love and are loathe to imagine the world without.
Ignorance is part and parcel of being human, we always know less than we think we know, but it is our job as human beings to reduce ordinary ignorance, eliminate willful ignorance, and aspire to higher ignorance as much as possible.
When did ignorance of science and history become cool?