Evolution is also not random; it’s the opposite of random. One of Darwin’s most important insights is that natural selection is a means by which small changes can add complexity to an organism. With each generation of offspring, the beneficial modifications can be retained. Each mutation that doesn’t work as well in nature either dies off with the organism directly, or gets outcompeted by others of its kind in succeeding generations of offspring. It’s by the process of evolution that beneficial changes are added up and up and up.
