Christendom had become a house divided in which, broadly speaking, Catholics base their faith on the teaching of the Church rather than the Bible. From a Catholic perspective this was not a question of seeing "the Church" or "the Bible" as opposing authorities, but of regarding the twin principles of Scripture and Tradition as normative in the life of the Church.
But one result of this emphasis was that some Catholics were inclined to accept the idea of Evolution. Like the thin end of the proverbial wedge, this acceptance of the principle of Evolution has gradually entered into the practical life of the Church, and to speak frankly, "corrupted" it.
Again it should be emphasised that this does not mean that the official Magisterium of the Church has been corrupted, but that in a practical sense an evolutionary mentality has entered into the Church's attitude towards the world.
In recent years Biblically oriented Christians have developed a very powerful approach to the Scriptural account of the origin of mankind and the world, one which is being increasingly vindicated by genuine scientific discoveries, as opposed to unproven theories.
The ideas used on this section of the site have largely come from these "Creationist" writers, whose main virtue is a strong belief in the inerrancy of the Bible, a belief maintained in the face of all sorts of attacks and indeed outright ridicule.
Happily, Catholic writers such as Gerard Keane are now applying themselves to the questions of Origins, but it also the case that there have always been a significant minority of Catholics who have refused to accept Evolution.