outliers

in outliers, gladwell analyzen the circumstances of usually successful people of their self-made rise to greatness. he answer question like this:
- why most profesional hockey players from canada have birthday in january, febuary and march
-why success is not always related to intelligece above IQ's of 120 and higer.

successful people were often lucky to be in the right place at the right time. 10 000 hours of working on skills seems to be a tule of thumb