Oniang’o has raised money to help 30,000 small farmers in Kenya, most of whom are women. She’s spent her career devoted to this cause, promoting better farming techniques and nutrition. She was once a member of the Kenyan parliament and a professor of food science in Kenya; today she’s an adjunct professor at Tufts. She’s advised countless international organizations, including the Gates Foundation, and in February she joined DuPont’s advisory committee on agricultural innovation and productivity.