It may seem like common sense, but when you look around all you see is how we are constantly pitted against each other. Once again this doesn't mean anarchists seek to stifle creativity and individual excellence, but we do hope to spread it out, and allow everyone to chase their dreams. Diversity is the key to survival in the future. The modern drive to standardize everything and apply the assembly line to all aspects of social life has left many alienated and hopeless. It has also been key to destroying our natural environment.
Diversity is a form of organization that is more organic.
So anarchists support diverse forms of democracy, family organization, production, dancing, loving, eating, whatever. Diverse organization is not always efficient, but we must question the importance of efficiency. Efficiency has never been for us. We work harder and get paid less. When we grow food in an efficient way, the path to that efficiency was the removal of land from everyday people to a corporation for profit.