Today, religion plays a significant role in the political positions people take on a number of important issues: stem cell research, abortion, right to life, gay marriage, etc. But how do people of the same faith come to radically different conclusions and positions on these issues? How has the right convinced a majority of evangelical Christians that there is a Biblical mandate to oppose abortion, stem cell research, and gay marriage? Or, why do progressive Christians believe they are called to be the voice of the voiceless, to advocate for the poor and to challenge aggressive foreign...