In evolutionary studies, genetic drift refers to the inevitability, without selection, for an allele to become fixed in a population just by chance. In 1931, a scientist named Sewell Wright demonstrated that the probabilty one allele will be fixed over another is determined by that allele's initial frequency in the population. So, let's play a game.
Do you agree with allowing of stem-cell research? If so, add 1. If not, subtract 1. The first number reached -20 or +20, ends the game. That idea has been fixed. The probability that +20 will be reached is determined by the frequency of people in JU who respond to blogs like this who agree with allowing of stem-cell research, a number that we do not know. How quickly one number or the other is reached can tell us something about the frequency of people who believe one thing or the other. Although, maybe not. It could have just been chance