Having a high iq doesn't always guarantee success. researchers zuo and cramond (2001) examined some of "terman's termites, and found that the most successful were

those who had achieve a consistent sense of self in adolescence.
Meaning that the most successful people usually are the one who finally understand their own weakness and positive traits during their adolescense, and started to hone their skills since that age in order to improve their personal value in the future.