 A fourth interpretative position is that the aim of Religion is to (a) examine the scope of “unity” or “compatibility” between rational religion and historical faith and (b) evaluate which aspects of historical faith (with Christianity being the primary focus) are apt vehicles for rational religion versus those which are incompatible with it (Pasternack 2014). Hence, the Religion was not written as a Christian apologetic, but rather is Kant’s inquiry into the relationship between natural theology and revealed religion. However, unlike the many other such inquiries written during the era, Kant’s own version of natural theology is one that shaped by moral rather than theoretical reason.