The more specific idea of Evolution now reached is - a change from an indefinite, incoherent homogeneity to a definite, coherent heterogeneity, accompanying the dissipation of motion and integration of matter.

Civilization is a progress from an indefinite, incoherent homogeneity toward a definite, coherent heterogeneity.

Evolution is an integration of matter and concomitant dissipation of motion during which the matter passes from an indefinite incoherent homogeneity to a definite coherent heterogeneity, and during which the retained motion undergoes a parallel transformation.

This survival of the fittest, which I have here sought to express in mechanical terms, is that which Mr. Darwin has called "natural selection, or the preservation of favoured races in the struggle for life."

Civilization is a progress from an indefinite, incoherent homogeneity toward a definite, coherent heterogeneity.

In science the important thing is to modify and change one's ideas as science advances.