“All warfare and bloodshed in human history have been the outcome of prejudice. This earth is one home and one nativity. God has created mankind with equal endowment and right to live upon the earth. Racial prejudice or separation into nations proceeds from human motives or ignorance. Why should we be separated by artificial and imaginary boundaries? This is one globe, one land, one country.”
‘Abdu’l-Baha
http://uhj.net/bahaiprinciples/bahai-12-principles.html