Mary didn’t have the power to remove the limits that society imposed on her girls, but it was her duty, she felt, to help pry off the restrictions they might place on themselves. Their dark skin, their gender, their economic status—none of those were acceptable excuses for not giving the fullest rein to their imaginations and ambitions. You can do better—we can do better, she told them with every word and every deed. For Mary Jackson, life was a long process of raising one’s expectations.