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Having done some research, I have found this regarding evolution.
Darwin in his book “Origin of Species”, in the 19th century , based on similarities between different species he concluded that they must have evolved from common ancestors.
Darwin did not explicitly deny existence of God and carefully avoided being termed an atheist.
However, his theory became popular and widely accepted by atheists, who had finally found a justification for their belief and became its evangelists. They maintained and propagated that the theory was an absolute fact, supported by scientific findings. With the scientific appeal attached, the idea spread rapidly and fools of past, came to be ranked with intellectuals. Since then, several stories have been written, to explain evolution of species from one-another. These stories are widespread and continue to evolve to this day, with no evidence.