[A]ll observed pygmy populations have a short life expectancy. Indeed, this, according to Dr Migliano's hypothesis, is the crucial evolutionary pressure. Of the six groups of pygmies for whom data exist, two have a life expectancy of 24 years and the other four about 16 years. [Economist Magazine.]
According to Richard Lynn, they only have an average IQ of 54. It's almost as if they're a species of sub-humans (which is how they are seen by other Africans who hunt them for food or keep them as slaves).
An anthropology web page says they don't keep track of how old they are and "attach no importance to the future or the past." Future-time orientation seems to be associated very strongly with IQ. The lowest IQ race of humans has the least future-time orientation (or even much sense of the past).