Where is the impetus for people of different Christian traditions to gather together to pray together? There is none that I can see. It is a radical act that goes against the grain of our contemporary tribalism. Sometimes I think Soloviev was right, that such an act will happen only when the churches find themselves against the eschatological wall, as it were. At the end of the world, in other words. If I embraced a realized eschatology, I would feel my back against that wall here and now.