CUMULATIVE EFFECT. “Although chimpanzees’ nut-cracking or dolphins’ use of protective nose-sponges does not seem to exceed what a lone chimpanzee or dolphin could invent alone, it is surely impossible for a single human to have discovered quantum mechanics, invented smartphones, visited the moon, or achieved any of the other feats that require standing on the shoulders of previous generations.”
http://www.pnas.org/content/114/30/7853.full