Since cofounding Bright Horizons Family Solutions, an international child care chain, in 1986, Linda Mason, who is 57 and lives in Belmont, has become a luminary in global humanitarian work. Now chairwoman of the worldwide relief organization Mercy Corps, she and her organization have documented atrocities in the Darfur region of Sudan and aided civilians in Congo, a place she once described as “ripped apart by brutality and lawlessness.”
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