Your focus is on fixing the culture. Changing the organizational culture to level the playing field is important. But culture change happens very slowly—and usually not at all until new faces have appeared in your company’s leadership ranks and new perspectives have begun to reshape its strategies. Your first priority should be to improve performance and promotion rates in underrepresented groups. You’ll find that culture change comes more readily from a critical mass of diverse executives than from a series of diversity and inclusion seminars or one high-profile minority hire.