A system, which is too perfect, is also too rigid because it does not need to evolve... One moves from rigid and brittle rocks, within the upper layer to ductile rocks below that can deform in a continuous fashion under the action of tectonic forces. Contrary to what is often assumed, the weak and imperfect parts are often those that allow the evolution to occur without any revolution... We tend to dissociate the individuals who are well adapted to our social life from those that have difficulties to follow the pace that is imposed on them by our life style. Yet a society that separates the producers from the others considered dead weight, even as marginal or excluded individuals, is a hard society, characterized by conflicts and often by complete rejection of minorities.

- Xavier Le Pichon