Colin Murphy: What do the Collison brothers and Jack Chambers mean when they talk about ‘abundance’?

What was the most potent meme of 2025? It was a single word: abundance. The word, and the idea behind it, have spread from California, first to the US as a whole, then out into the world. Last week, it cropped up more than once in an article in these pages by Public Expenditure Minister Jack Chambers.