Lean InIn 2013, Sheryl Sandberg's Lean In became a massive cultural phenomenon and its title became an instant catchphrase for empowering women. The book soared to the top of bestseller lists internationally, igniting global conversations about women and ambition. Sandberg packed theatres, dominated opinion pages, appeared on every major television show and on the cover of Time magazine, and sparked ferocious debate about women and leadership. Ask most women