"My question is, What role can open access play in this? I'm not so optimistic as to think that simply making primary science easily available online will do much to foster scientific literacy and scientific knowledge among non-scientists, let alone convert creationists to evolutionists. Easy access completes the puzzle when there is antecedent interest and background, and we need help from teachers, journalists, and politicians to create that interest and background. For the same reason, however, I'm not so pessimistic as to think that OA will make no difference.
There are two mistakes to avoid here. One is to think that OA has no role to play in helping non-scientists understand science. We can call this the Royal Society mistake, after the RS's recent report on educating lay readers about science that doesn't even mention OA. The other mistake is to think that the overriding purpose of OA is to educate lay readers. No OA advocates believe this, but some publisher-opponents of OA either believe it or pretend to believe it in order set it up as a straw man and knock it down. (The most recent example is the American Society of Human Genetics, as quoted in the NYTimes for May 8.) To avoid both mistakes we have to accept that the problem and solution are both complicated. OA will play a role in public education about science --it's neither irrelevant nor sufficient-- and the size of that role is up to all of us."