In Bart Gruzalski's On the Buddha, he makes the claim that "There is a tendency among those who are attracted to Buddhism to sidestep morality and focus on meditation (p. 41)." I wonder if this is true. There is anecdotal evidence for this claim, and I think that part of the attraction for some people is that Buddhists in the United States do not have the same reputation for political and moral conservatism and moralizing in general that is so off-putting to some. However, to deal with the problem of suffering, which is a central problem for human beings according to the Buddha, it is not enough to meditate. We must also be moral. In the Buddha's first sermon both the meditative and moral aspects of life are emphasized. In order to be truly enlightened, one must live in the right way.
This last point is something that Buddhism has in common with both Christianity and Aristotle's philosophical views, namely, that our ethical character has an impact on our intellectual character. Good people are better at grasping the good, the true, and the beautiful, generally speaking, than immoral or vicious people. This means that it is not enough to be intelligent if one is seeking truth. One must also be good.