3 Answers

Because someone always thinks their better than someone else.

Because it is human nature to be competitive. Anytime there is a fight its one against the other usually for resource or a beer.. Or woman or whatever. Instinct. We are the most intelligent of the animal world as humans, we can reason, sometimes our reasoning gets us in trouble. We also have the intellect to build machines and weapons of war to make our natural instinct to fight easier and more effective. Aren't we the fun bunch!!

the best way I can explain it to you is through husbands and wives. It's basically because we are different. Men and women have different roles. Now my answer is not intended to be sexist or anything other that from experience so don't get upset. Ok the mans role is to support his wife in all that she does, thinks or wants. The wifes role is the same including love. Now the problems start when we do not listen to each other, we try to control or change or want our own way. We stop seeing the others point of view and instead of listening we try to give solutions when all our partners really want is to be listened to. Stress builds and before you know it an all out war is happening. You should read the book why Mars and Venus collide. It's a good book on relationships and if you follow the simple to follow rules your relationship will be much better.