In today's world, power lies in our political systems and our economies. These two institutions, broadly speaking, control the way we live our lives. They carry huge implications for our freedoms, our human rights and our levels of security - financial and otherwise. Now consider who has the greatest access to, and control over, these institutions. Overwhelmingly, it's men. This is the conclusion drawn by reams of research into gender parity across the globe. Take, for example, the World Economic Forum's new Global Gender Gap Report, which measures the gender gaps in four key areas - health, education, economic participation and political representation.