To understand the mind, follow its practical consequences.
The improvement of the productive powers of labor, and the greater part of the skill, dexterity, and judgement with which it is anywhere directed or applied, seem to have been the effects of division of labor.
统治者的首要职责是保护社会免受其他独立社会的暴力和侵略,只有通过军事力量才能实现这一职责。
Modern forestry must balance three axes: ecology, economy and ethics.