Is someone born as a winner ,someone born as a loser?

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Last week ,a friend of mine recommended me a book ,entitled The Bell Curve :Intelligence and Class Structure in American Life ..This book offers an interesting but controversial viewpoint :people are not created equal in intelligence ,therefore they tend to behave different in study and on their job according to their intelligence level .Generally speaking ,the Whites always score higher than the Blacks and Latintos on tests and as a result Whites always get higher social status and living standards. It is worth mentioning that all the conclusions are based on concrete experiments and plenty of data .Of course ,some people support the theses and think the book merits considering, but others .call it bad science and racism .In some sense ,I fell what the authors said are somewhat right .It seems that intelligence can be heritable and plays an important part in our daily life. As far as I am concerned ,sometimes I cannot do things as well as others do despite my tremendous efforts .Maybe that is simply because they are more talented ?what is your opinion ?