Can't we all just get along?

Religion, country, territory, raises, hate, and pride all can cause a war. The earth is fallen apart because of the weapons we make and the bomb that we dropped on earth. Were all leaving in one place "Earth". Earthquake, tsunami, tornado, and global warning those could happen anytime and there will be no place for us to live. Why can't we be as one and save the only place were leaving in. why can't we make a weapon that could save the earth. When are we goin to learn our lesson? when the earth is fallen apart? when theirs a different species trying to take over our place? Why Can't we all just get along and start working together, save our home.