This is a cool visualization, but the data it is working from is pretty poor. A lot of the "influenced"s and "influenced by"s are pretty sketchy, and some are

This is a cool visualization, but the data it is working from is pretty poor. A lot of the "influenced"s and "influenced by"s are pretty sketchy, and some are just plain nonsense. Also categorizing the languages is pretty iffy. I can't imagine any possible definition of "functional programming language" that includes lua, python and ruby, but does not include perl.