Is multi-level selection really controversial? It seems bizarre to claim that natural selection only works on a single level of abstraction. As we go from the i

Is multi-level selection really controversial? It seems bizarre to claim that natural selection only works on a single level of abstraction. As we go from the individual, either up or down in scale, do the mechanisms of natural selection just stop existing? I find "individual-only" selection patently absurd, or at least demanding of extraordinary evidence.