If someone's brain isn't at its healthiest, their decisions won't be as stellar as they could be, potentially costing them thousands, even millions, of dollars. For leaders, it's crucial to nurture the 'chief executive' part of the brain, the frontal lobes.

From about 2000, Africa has come into an economic renaissance: Between 2000 and 2008, we saw a marked improvement in macro-economic stability, with inflation falling and interest rates hitting single digits even in areas like Nigeria. We have seen robust GDP growth, 17% in Angola and 5.5% in Ghana and Nigeria in 2008 for example, combined with increases in FDI, which was up 25% year on year between 2000 and 2005.

You can't build a bridge or an aircraft using postmodernist feminist epistemology.

What failure really means is that you are trying to live life, and the fact that you fail means that you are trying. As soon as you try to avoid failure, you are facing the wrong direction.

All the market research we have done shows that consumers use diamonds to mark special moments in their lives because they are timeless, have been in the ground 3 billion years and are unique.