My feeling is that it was because for much of our history, we lived in the dark.
Will not time reveal the lasting importance of friends and mutual respect? Be kind to those who think well of you and those you know and try to add positive elements to your world. Promote peace in your heart and sunshine in the minds of those around you by your own good works. Elevate the level of discussion by thinking less of the issues and more of how you can reduce the tension of stress that arises with honest disagreement. Relax by breathing more deeply and consciously.