http://www.allaboutworldview.org/secular-worldview.htm
I find in this description of secularism all that I need to understand why evolutionism is still there, in spite of its lack of consistency with scientific data:
Secular Science – Neo-Darwinian Evolution
The theory of Neo-Darwinism purports that natural selection acts on genetic variations within individuals in populations and that mutations (especially random copying errors in DNA) provide the main source of these variations. Because positive mutations seem to be rare, Neo-Darwinism contends that evolution will be a slow, gradual process. Without naturalistic evolution, there is no Secular Worldview. Anything else would demand a Creator, which would mean that man is not the source of all things. Secular Humanists believe that science has proven the theory of evolution to the extent that it is no longer a theory but a scientific fact. According to this “fact,” man is the most highly evolved of all creatures, and is now responsible for directing and aiding the evolutionary process.
Of particular interest to me in this description is of course the phrase: "Without naturalistic evolution, there is no Secular Worldview. Anything else would demand a Creator, which would mean that man is not the source of all things."
So, the idea of evolutionism is growing, because anything else would mean that there is a God, and that people would have to investigate the major world religions for an answer to who God is.
Best regards, Peter