I don't know much about Warren, but I did hear him on TV the other day talking about abortion and he made one comment which I think is worth repeating. "There may be accidental parents, but there are no accidental babies. Every baby conceived is conceived by God with a purpose for their life." His view seems to be solidly pro-life which is a plus.
That was in his book and the study we did at our home. Two people in the group were greatly blessed by that statement: one was a woman who had a child out of wedlock many years ago, and one was a man who was born out of wedlock and had carried that shame for 70 years. A lot of freedom for them came that night.