"Ideas that have helped mankind" is an essay which has been written by a great Britisher philosopher and mathematician Bertrand Russell (1812 - 1970 ). In this essay martin has depicted the ideas which help mankind in becoming fully civilized and far superior to animals.
According to martin, thousands of year back, our forefathers spend their life like wild animals. They used to live in forest and caves. Their life were not save. As population increased they knew everything . At last we can say that skill is the source of development.