Diversity isn’t a numbers game – it’s a power game, and one that most companies are losing. Strong representation of women on boards has been achieved thanks to the rapid ascent of female NEDs. But for a company to be truly gender diverse, diverse groups must hold a healthy grip of the executive decision-making pendulum. Clearly that can only happen by gaining a more critical mass of such talent in the most powerful C-suite roles. So what’s holding companies back?