 If averages mattered, and due to the nature of the wiki software (no voting) they almost certainly don't, I would say that the Wikipedia community is slightly more liberal than the U.S. population on average, because we are global and the international community of English speakers is slightly more liberal than the U.S. population.There are no data or surveys to back that.A number of politically conservative commentators have argued that Wikipedia's coverage is affected by liberal bias.