Natural evolution has become a big deal. We have lots of data to support the theory. As a topic it still sells books and magazines. It is still debated. The insights from it have helped to spawn at least one industry (bio tech). It is used to explain everything from disease to psychology. But within your lifetime, humanity is unlikely to evolve. Natural evolution is a big deal, but it is unlikely to change your life in the next few decades.
By contrast, social evolution is obscure. We have lots of data to support the theory that societies evolve over time, memes doing for social life what genes do for biological life. As a topic, though, it is all but ignored. But within your lifetime, society has already evolved. Some in fairly innocuous ways, as disco gives way to hip-hop or stock analysts give way to algorithms; and some in fairly significantly ways, such as the exintinction of communism and capitalism. Social evolution is a big deal in terms of impact, but it gets little coverage.