We used to talk about the ‘developing world’ and the ‘developed world’. Now people talk about the North and the Global South, and of north-south and south-south programs. But I have always preferred to speak of our world in terms of ‘horizontal development’ – neighbour to neighbour – rather than ‘vertical development’ – expert to novice.

And I have noticed how much our worlds are coming together recently, more than ever before. We have ‘homeless’, the global south has ‘refugees’ or ‘climate change migrants’. But they are the same – they are people who don’t have a home, for a whole variety of reasons. And many people are starting to make that link.