Another Puppeteer breeding experiment was the "Lucky Human Project". The puppeteer government concluded that humans' most notable quality was luck, and decided to improve this trait. Manipulating politics on Earth through bribery and blackmail, the Puppeteers caused 'Birth Lotteries' on Earth around 2650, biasing human genetic selection (controlled, in the Known Space universe, by the "Fertility Board of the United Nations") towards encouraging luck. The character Teela Brown, who journeys to the Ringworld, is an outcome of this Lucky Human Project, though not quite the outcome the Puppeteers would have liked. Her luck was highly selective, bending probability so that the outcome most beneficial to her or her descendants would come to pass, without regard to its effects on those around her — which was contrary to the interest of the rest of the Ringworld expedition on more than one occasion.