Fifty years after the Equal Pay Act, why are women still living in a man's world? Debora L. Spar never thought of herself as a feminist. Raised after the tumult of the 1960s, she presumed the gender war was over. As one of the youngest female professors to be tenured at Harvard Business School and a mother of three, she swore to young women that they could have it all. "We thought we could just glide into the new era of equality, with babies, board...