They teach the need for farming to improve the environment and make good use of natural resources.

VOA: special.2009.04.14

That was the natural thing to do given the character of life, which was based upon farming, if you leave you lose your farm, and based upon the difficulty of transportation.

生活的意义就是定居一处,种田养家,离开了这片土地,就失去了食物的来源,另外,古时的交通非常落后

耶鲁公开课 - 古希腊历史简介课程节选