Darwin described ‘Evolution’ as the growth of a tree, the “Tree of Life.” The tree began with a single organism at the root, with myriad species branching off from the trunk. The late 20th century version of the Modern Synthesis assumed the main pattern of evolutionary divergence to be at all times and for all taxa in the semblance of a tree. Microbes constantly swap DNA. Hybrid plants and animals cross species lines, blurring the demarcation. The theory of evolution continues to evolve…. The year