Powering Up: How America’s Women Achievers Become Leaders is a call to leadership heeding women to step up, realize their full potential, and become the leaders they are meant to be. Individual leadership, however, isn’t enough. Every woman for herself is losing strategy. A few lone women, no matter how exceptional they are, have little impact on the conversation of a nearly all-male group, let alone its decisions. It takes critical mass to shift group dynamic.