  Proponents of liberal eugenics have offer several responses to this concern. Some contend that these technologies will eventually become widely available and thus, that the critics’ worries are overstated. For example, Green (2007) notes that all innovations have a period of diffusion, during which early adopters pay higher prices and take some risks for the potential of leading the way forward, and then, if the technology is successful, prices drop and the wider public gains access through the market. Similarly, Buchanan (2011) compares genetic intervention to literacy, numeracy, and agriculture, and argues that these innovations too were only available to a few at the start, but then became broadly accessible.