It makes people much more enthusiastic and cooperative when they have ego goals to fulfill, but ultimately that kind of motivation is destructive. Any effort that has self-glorification as its final endpoint is bound to end in disaster. Now we´re paying the price. When you try to climb a mountain to prove how big you are, you almost never make it. And even if you do it´s a hollow victory. In order to sustain the victory you have to prove yourself again and again in some other way, and again and again and again, driven forever to fill a false image, haunted by the fear that the image is not true and someone will find out. That´s never the way.