Humans as Chemotherapy

If you&rsquo;ve ever experienced it or seen it in action, chemotherapy doesn&rsquo;t seem very good. It is a brutal process. Oncologists practice the fine art of killing the cancer without entirely killing the patient. But the balancing act isn&rsquo;t always successful. Suppose the earth were semi-sentient, and had some vague billion-year-long evolutionary memory that suggested a looming…