The quantity of human food which the earth is capable of returning even to the most wretched system of agriculture,so much exceeds what could be obtained in the purely pastoral state,that a great increase of population is invariably the result.

• 即令在最糟糕的农业制度下，土地所能提供的食物也远比在单纯放牧状况下要多得多，结果是人口大量增加。