It's a long-standing theme. Thomas Pikettey claims that, throughout the 20th century, about 50% of people own nothing, 40% own their "stuff" - house & car - and 10% own everything else. And, really, that it's even just the top 2-3% who own the vast majority of that everything-else, except for a brief window after world wars destroyed all the capital, and temporarily put the world into a slightly less unequal condition.