In my reading for "A Case for a Christian Theology in a Postmodern World", according to Allen, it is difficult to maintain certainty of conviction in Christianity in a postmodern age due to the existence of multiple beliefs and perspectives in the world makes it challenging to affirm one particular belief as true and the view that all beliefs are equally valid that there is no absolute truth makes it difficult to affirm Christianity as the true belief. In addition that lack of authority, declining the traditional institutions and leaders in society makes it challenging to affirm Christianity as a trustworthy belief. And by acknowledging these challenges, according to Allen, we can better develop ways to defend and present Christianity in a postmodern age.