Pre-hominids seemed more primitive than prehistoric humans who had tamed fire.Natives armed with spears and arrows seem less technologically advanced than invaders armed with firearms.The convoluted way that tech advances influence each other was the entire premise behind James Burke's documentary series Connections and The Day The Universe Changed, which you should watch if you haven't already. The tabletop boardgame Civilization popularized the use of tech trees in 1980.
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He is the founder of PUBSNET, a tools training company, and The Editors, a Web development group.
Doyle has been a featured presenter at numerous regional and national conferences on Web technologies.
A much better model is the multi-branched "tech tree." The technology required to make an iron sword has the prerequisite of a supply of iron and a furnace to heat it.
Both of which require the technology of making fire.