[apsophus]

Many things, from the Liberal government's new taxes on landed wealth in the 1910s, to the advent of democratic socialism and universal healthcare after the Labour party's victory in the 1945 election, to the 'Long Boom' of economic growth that the whole capitalist world experienced from the end of WW2 up to the 1970s.

Data like these are interesting, but you still need the deep historical context to make sense of what it all means. Of course, for the overall big picture, you couldn't do better than Thomas Piketty's _Capital in the Twenty-First Century_.