We must address, individually and collectively, moral and ethical issues raised by cutting-edge research in artificial intelligence and biotechnology, which will enable significant life extension, designer babies, and memory extraction.

For centuries, economic thinkers, from Adam Smith to John Maynard Keynes, have tried to identify the elusive formula that makes some countries more prosperous and successful than others. My curiosity about this topic spurred me, as a young professor of economics in the late 1970s, to research new ways of measuring national competitiveness.

It was a hallmark of Nelson Mandela's leadership that being open to change made him appear not weaker, but even stronger.

I am a great enthusiast and early adopter of technology, but sometimes I wonder whether the inexorable integration of technology in our lives could diminish some of our quintessential human capacities, such as compassion and cooperation.

People who have grown up in a world where this was not a concern and suddenly start hearing about climate change - it's very difficult. It's a very, very abstract concept. So we need to work on making it very educational and very, very clear, in very simple terms.

There is no larger collective-action problem than the environment. The three biggest lies of the environmental movement is that every little bit helps, you can do your part, and together we can do it.

The science linking the increased frequency and severity of extreme weather to the climate crisis has matured tremendously in the last couple of years.

I grew up in Hockley, Birmingham. It was an environment I'll never forget in terms of playing football on local pitches, kicking a ball around in the front garden and all over the house. It was a positive place to live, and somewhere, that gave me the right grounding for where I am today.