Perhaps travel cannot prevent bigotry, but by demonstrating that all peoples cry, laugh, eat, worry, and die, it can introduce the idea that if we try and understand each other, we may even become friends.
Don't go around saying the world owes you a living. The world owes you nothing. It was here first. If you don't like something, change it. If you can't change it, change your attitude. Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek.
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change. All changes, even the most longed for, have their melancholy; for what we leave behind us is a part of ourselves; we must die to one life before we can enter another.
Take up one idea. Make that one idea your life - think of it, dream of it, live on that idea. Let the brain, muscles, nerves, every part of your body, be full of that idea, and just leave every other idea alone. This is the way to success.