Fred Swaniker is CEO of the African Leadership Group. He's been named one of the world’s most influential people by Time Magazine. And the entrepreneur from Ghana has the ambitious goal of educating 3 million young people over 50 years. On Art of Power, Swaniker tells Aarti Shahani about his journey from child refugee to McKinsey management consultant to educator-activist, building schools across the continent of Africa, where almost 60% of the population is under 25. He also explains how he knows when an idea is worth pursuing. Most passions, he argues, are not worth your time.