If there is a plurality of alien cultures, however, this theory may break down under the uniformity of motive concept because it would take just a single extraterrestrial civilization to decide to act contrary to the imperative within our range of detection for it to be undone, and the probability of such a violation increases with the number of civilizations.[4] This idea, however, becomes more plausible if all civilizations tend to evolve similar cultural standards and values with regard to contact much like convergent evolution on Earth has independently evolved eyes on numerous occasions,[5] or all civilizations follow the lead of some particularly distinguished civilization, such as the first civilization among them.[6]