But there already are hundreds of specially trained peace teachers in 70 countries, says Elise Boulding, a peace writer and lecturer. We'll be teaching peace in classrooms in the first grade. Every year, kids will learn more about how to deal with conflict without fighting or being violent. By the time kids are in the sixth grade, they'll be very good at this and begin to teach their parents how to be more peaceful. The Yak hopes Boulding's dream comes true.
Humans can be the friendliest creatures on the planet.
But they can also be the meanest - wars and fighting have been around as long as humans have. But in the 20th Century, war and fighting became a lot scarier with the development of high-powered guns and chemical, biological and nuclear weapons. The United States and Russia alone have thousands of nuclear weapons - enough to destroy all of civilization. Last summer, India and Pakistan tested nuclear weapons for the first time, and other countries are expected to test them in the future. Many people think nuclear weapons should be destroyed to make the world safer.