Natural productions are generally formed by degrees. Vegetables are raised from a tender shoot, and animals from an infant state. The latter, being active, extend together their operations and their powers, and have a progress in what they perform, as well as in the faculties they acquire. This progress in the case of man is continued to a greater extent than in that of any other animal. Not only the individual advances from infancy to manhood, but the species itself from rudeness to civilization
