根据以下内容回答题：Each nation has its own peculiar character which distinguishes it from others．But the peo-pies of the world have more points in common than points in which they differ．One type of per-son that is common in evcry country is the one who always tries to do as littl．e as possible and to get as much as possible in return．His opposite，the man who is in the habit of doing more than is strictly necessary and who is ready to accept what is offered in return，is rare everywhere． Both these tyDes are usually unconscious of their character．The man who avoids effort is always talking about his“rights”：he appears to think that society owes him a pleasant，easy life．The man who tries to do as little as he Call is always full of excuses：if he has neglected to do something，it was because he had a headache，or the weather was too hot——or too cold——or because he was prevented by bad luck．At first，other people，such as his friends and his em-ployer，generously accept his stories；but soon they realize what kind of person he is．In the long run he deceives only himself．When his friends become cool towards him and he fails to make progress in his job，he is surprised and hurt．He blames everyone and everything except himseIf．He feels that society is failing in its duties towards him，and that he is being unjustly treated．

The central idea of Paragraph l is that__________ .