Depending on your definition of "succeeding in life", I'm not sure this is true. The current leaders of various countries, such as the USA or Russia, are arguab

Depending on your definition of "succeeding in life", I'm not sure this is true. The current leaders of various countries, such as the USA or Russia, are arguably counter-examples: they don't seem to me to be pleasant people, yet by most standards they could be said to have achieved success in life.