I think one important point the article left out: time as a filter for how good an idea or work is. There are a large number of mediocre or poor thinkers that l

I think one important point the article left out: time as a filter for how good an idea or work is. There are a large number of mediocre or poor thinkers that left ideas that didn't stand the test of time. Only a few have, and so you're actually more likely to see a list that includes a large number of philosophers from the past because generations of other philosophers have thought about what they had to say and realize that it is still relevant. There may be the equivalent of 13 Platos in Athens right now, but we won't know whether they have anything worth adding until enough time has gone by to show whether their ideas are worth anything or not. I'm not the first person to realize this point, BTW.