1 The first step is primates then primates turn to apes chimp and human lines split bipedal hominoids hominoid brains get bigger humans get modern with the first homo sapiens symbolic expression settling down with huts and houses the Neolithic revolution and then the urban revolution 2 He uses the major biological and evolutionary differences as criteria for differentiating his stages 3 I think spirituality and religion came around during the stage 6th stage because of symbolic expression This was the first stage with any real expression with etchings beads and ritualistic burials and this is when social networks started to grow 4 I don t know if it should be another step by itself or if it should be added in with another step but I think the creation of political systems and governments should also be added
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