Jessica Guynn , USA TODAYPublished 4:04 p.m. ET March 29, 2017 | Updated 10:28 a.m. ET March 30, 2017 Sheryl Sandberg’s bestseller Lean In: Women, Work, and the Will to Lead launched a national conversation on gender in the workplace and an online community of millions of working women ready to bulldoze the barriers they face, from being paid