“…On this question, opinion generally varies widely (as do the contributions to this volume), but there does seem to be consensus that if such restrictions are imposed, they should be done cautiously, infrequently, and in only the worst cases. Thus, Leon Kass, who probably takes the strongest explicit position in this volume that there are questions that science should not explore, at the same time acknowledges that society should not seek to prohibit all, or even any, research that is found to be ''forbidding'' (Kass 2009). …”