CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats. When we cut someone’s DNA we can force a change through the RNA in a CRISPR enzyme. Editing the DNA of an embryo can dramatically change the person, things like the shape of their face, their IQ, height, propensity for cancer. We are becoming interested in changing propensity for cancer. The documentary Human Nature on Netflix explores this ability to play God.