As trade ministers from across the world meet in Paris this week, they will be aware of growing scepticism about the outlook for further liberalising international trade. I understand the anxiety but I think the pessimism is misplaced. There is still time - just - to deliver on the original development-through-trade agenda envisaged in the World Trade Organisation's Doha round of talks before negotiating fatigue takes over.

A successful Doha round is vital to all of us. First, because open markets are a precondition for growth, and growth is essential to development.