Daryl Davis

https://en.m.wikipedia.org/wiki/Daryl_Davis

What I have come to find to be the greatest and most effective and successful weapon that we can use, known to man, to combat such adversaries as ignorance, racism, hatred, violence, is also the least expensive weapon, and the one that is the least used by Americans. That weapon is called communication.

Daryl Davis, "Klan We Talk?", TEDxCapeMay, 9 January 2018.