The issue focused on whether natural selection could cause selection on genetic traits that cause maladaptive traits in humans. However, there are important ethical questions associated with research using humans for scientific purposes. Some researchers choose to select individuals from studies with specific aims in mind. Because such selection may cause suffering to individuals (including selection for traits that cause suffering), these scientists must seek ethical approval before conducting such selection. Other researchers choose to conduct selection studies with general aims in mind. Because such selection may cause suffering to individuals (including