On the nature of natural selection
Some philosophers, known as statisticalists, claim that the concept of natural selection, as it is normally presented in population genetics, is statistical in character and cannot be construed in causal terms. On the contrary, other philosophers, known as causalists, argue against the statistical view and reaffirm the causal interpretation of natural selection. A key element in this debate is the dispute on the nature of drift. If drift is a cause of evolution, uncertainty in population genetics is due to some processes that make a population deviate from predicted outcomes.