Amazing what can be achieved with just simple drawing of lines and colors, and of course with fantastic soundtrack. This is classic anime by independent animator Taku Furukawa, that I've never heard of before. He created many short films over the years, some are very abstract and experimental, and they all seem to be in such minimalistic and very basic, child-like style of hand drawing. The film is described as "chronology of human progress, or the lack of it".
There was a DVD release in 1998, with compilation of his works. You can read this very informative article about it, with reviews and analysis of his films.
Taku Fukurawa also has active website and blog.