….. we have evolved massive creative brains, capable of planning and predicting the future, of invention and creativity, and this had helped us extract ourselves from many of the historical shackles of natural selection. We have externalized the stomach with the invention of cooking, so we don’t have to digest a whole range of chewy molecules, because they are already partly broken down by our unique control of elemental fire. We have bypassed many aspects of a life of nomadic sustenance, as well as hunting and gathering, by settling and domesticating all manner of beasts of the field and plants of the ground. This also has changed our culture, technology, and even our genes. We have radically eliminated diseases that scythed down ancient populations with casual indifference — plagues, malarias, cancers, pestilence. Smallpox once killed hundreds of thousands every year. Since the 1980s, as a result of vaccination, there have been no cases of smallpox. Polio looks set to follow soon as a disease only of interest to historians. These sorts of evolutionary pressures have been radically altered as a result of invention and science and the technology that has come about through our own evolutionary trajectory.From: A Brief History of Everyone Who Ever Lived: The Human Story Retold Through Our Genes
Author: Adam Rutherford
Publisher: Orion Publishing Group
Copyright 2016, 2017 by Adam Rutherford.
Trajectory is an interesting choice of word.