This Is What A Traffic Controller Looks Like. The Tech Was Nice Enough To Explain To Me How It Work Our level of intelligence may possibly have developed by following a very similar evolutionary dynamic to the one that caused the giraffe to develop its long neck.The primary dynamic was probably basic survival. For the giraffe, a longer neck meant that it could reach higher leaves in trees, while for people bigger brains meant that we could reach higher levels of understanding of the workings of an alien and hostile ground-based environment.