lot of water has gone under the bridge since the first century. U raise a good point. Any Christian social philosophy cannot ignore Marx. He may have been a third rate economist, but he was a first rate philosopher. He pointed out the class structure of capitalism. His solutions weren't so hot, but his analysis was spot on. Also cannot reject the Enlightenment, which post modernism tends to do. I like Paul Tillich's "Religious Socialism.," formulated in Germany after WWI. Problem was, very few understood what he meant. He was neither formulating a new political party nor a new religion, but was trying to unite those who saw in the political vacuum of post war Germany around a vision of society guide by what he called "Ultimate Concern." This is prolly more than u asked for. But this solutions have to be addressed historically, and I appreciate your raising the question. Tillich was the first German professor fired because he protested what was happening to the Jews in Germany in the 1930s. Great man. He later immigrated to the U. S. Taught at Union Theological Seminary, Harvard and the U. of Chicago, where I met him.