equilibrium, not!

This equilibrium, however, like the equilibrium of the price system, is a moving equilibrium in that it is constantly being changed by change in the parameters of the system, either through genetic mutation, by producing new species or changing old ones, or through changes in the physical parameters of the system through soil erosion or formation (climate changes, ice ages, etc.). This change in parameters, of course, is evolution. It is a disequilibrium system. Equilibrium, indeed, is unknown in the real world in any strict sense, although temporary and partial equilibria are necessary for our system of perception. If our perceptions were sharp enough we would be incapable of taxonomy. Every second the whole world would look different (in fact, it is). All taxonomy, indeed, is a product of the inadequacies of human perception. How very fortunate these inadequacies are!