My own advice to people who would be in office for two or three terms is that they must accept democratic rotation. Ideally not put themselves up for re-election and allow the system to work.

As we move forward, you cannot resolve the potential food crisis or shortages without science being part of the solution. Science has to be part of the solution but African governments - and these are decisions for governments, whether they embrace or do not embrace genetically modified food - and for the moment, most African companies do not accept genetically modified seeds.

I used to tell the story about as a young man in high school one of the professors came in and put a broad white sheet on the board with a dot in the right hand corner and said, "Boys, what do you see?" And we all shouted, a black dot. He stood back and said, "not a single one of you saw the broad white sheet, you all saw the black dot." He went on to tell us to focus on the broader picture, don't focus on the negative.

When things are really desperate and hopeless and you can't do anything about this, and there's a sense that something must be done, that is something usually leads to the U.N.

The death toll from small arms dwarfs that of all other weapons systems — and in most years greatly exceeds the toll of the atomic bombs that devastated Hiroshima and Nagasaki. In terms of the carnage they cause, small arms, indeed, could well be described as 'weapons of mass destruction'.

I think what gives me hope is I have the sense that the people of Kenya have turned the page. They are keen to get a new political dispensation. They are keen to fight corruption and impunity, and in that sense they are leaving the political elite behind.

The happiness of any society begins with the well being of the families that live in it.