 It is suggested that since the FOXP2 gene controls synapses, its disconnection from a formerly complex network of genes instantly removed many instincts including ones that drove sexual selection.It is also suggested that it allowed more genetic variants that affect the phenotype to accumulate in humans, which in combination with increased synaptic plasticity made modern humans more able to survive environmental change and to colonize new environments and innovate.The theory that the origin of complex language was the most recent step in human evolution is considered unlikely as storytelling about past environments would be of little use in droughts with novel distributions of water while individual ability to make correct predictions would be useful and allow for differential survival that could eliminate the archaic version altogether, as opposed to selection for language in which some primitives could use imitation as long as there were enough storytellers in the group to keep the knowledge alive for long times which predicts that some individuals would have retained the archaic version if the modern version was for language.