I suppose just thinking might be a start!
When mentioning critical thinking I am just suggesting we all try to stop thinking in binary, black and white terms.
Currently we focus on the acquisition and occasional retention of information, for its own sake (to pass exams, for instance), but that is always subject to the way that information is given and, indeed, what information is actually given out. History is written by the victors and all that…
Critical thinking can, of course, never be universal as we are all subject to episodes of emotion and irrational thoughts but at least having the ability to ‘see the other side‘, to seek out differing views and to find differing sources of ‘truth’ can only help, I’d imagine.