The problems that the world faces - from nuclear proliferation to climate change - can't be tackled by the West alone. They need a coalition of not just West and East, but they need a coalition of Christian and Jew and Muslim.

The biggest opportunity in 2013 is in Africa. It has seven out of the ten fastest-growing economies in the world. In Nigeria alone there are 100 million people with mobile phones. In total, 300 million Africans - five times the population of Britain - are in the middle class.

I've committed myself to serve my constituents in South Shields and I have committed myself to British politics.

The wedding ring on my left hand was bought by my grandfather, Samuel Miliband, in Brussels in 1920. I never knew him, as he died when I was one. But his ring was kept by my aunt until it was placed on my finger by my wife Louise 32 years later.

First, climate change is the greatest long-term threat faced by humanity. It could cause more human and financial suffering than the two world wars and the great depression put together. All countries will be affected, but the poorest countries will be hit hardest. Secondly, the costs of inaction far outweigh the costs of action.

Economic dynamism can be combined with environmental and social responsibility. High financial returns can go hand in hand with respect for human rights, and the preservation of the planet's natural resources

I don't think I've ever been accused of being faddish. I'm more Marks & Spencer than Ted Baker.