[00:00.00]喜欢chazidian.com,就把chazidian.com复制到QQ个人资料中!Lesson 45 Of men and galaxies
[00:06.30]First listen and then answer the following question.
[00:11.05]What is the most influential factor in any human society?
[00:16.98]In man's early days,competition with other creatures must have been critical.
[00:24.56]But this phase of our development is now finished.
[00:29.52]Indeed,
[00:32.16]we lack practice and experience nowadays in dealing with primitive conditions.
[00:39.11]I am sure that,without modern weapons,
[00:43.86]I would make a very poor show of disputing the ownership of a cave with a bear,
[00:50.70]and in this I do not think that I stand alone.
[00:55.98]The last creature to compete with man was the mosquito.
[01:01.44]But even the mosquito
[01:04.68]has been subdued by attention to drainage and by chemical sprays
[01:11.16]Competition between ourselves,person against person,
[01:16.62]community against community,still persists,however;
[01:22.36]and it is as fierce as it ever was.
[01:26.83]But the competition of man against man is not the simple process
[01:32.68]envisioned in biology.
[01:36.16]It is not a simple competition for a
[01:40.83] fixed amount of food determined by the physical environment,
[01:46.40]because the environment that determines ourevolution
[01:51.05]is no longer essentially physical.