Well... these lists are always somewhat contrived. Popper in particular feels like a hole in that list. If we scoot the decade a few years forward (say 1924-19

Well... these lists are always somewhat contrived. Popper in particular feels like a hole in that list. If we scoot the decade a few years forward (say 1924-1934), he fits. Seems fair, considering he was busy fleeing nazism att and published soon after. That said, there is something to it. The pre-WWII era was philosophically charged, and a lot of today's philosophical perspectives derive from that time. You might even throw in Keynes & Ayn Rand. Maybe Hayek. Rand isn't often quoted or referred to, but its hard to deny influence. A lot of "modern"communist thinkers like Trotsky & Luxembourg are most known from this period. They obviously have a following. Whether or not you'd strictly call those philosophers is debatable but.. I'd also say that much of it seems dated and naive from our vantage 100 years later. I'm not sure any of them are destined to be a plato, or even a Nietzsche.