Unwanted Evolution

“We mostly think of evolution as a process that has the power to build structures of incredible beauty and functionality, like multicellular organisms, the nervous system, and human language. But evolutionary dynamics can also lead to processes that are not wanted, such as cancer, because they oppose the survival interests of the organism. The somatic evolution of cancer is a consequence of our cells being individual replicators. ”  https://www.sciencemag.org/content/342/6161/938.full