Slightly off-topic, but besides all the important contributions of Alan Kay, there is also his famous quote:

> Point of view is worth 80 IQ points

The wisdom of it is that it suggests a profound change in the point of view of what intelligence is. Although I suspect this must have been researched well before the quote, it summarizes so beautifully the fact that intelligence isn't just some single-dimensional hard coded genetic trait, but something transferable and even contagious through language. Love that quote.