Even non-theists can see that fish-to-Frank evolution does not work. G.H. Harper is an atheist and holds to a steady state theory of species. We propose the stasis of Essential Types of Life (ETL’s). That is, what remains static in the living realm is at a higher level than species. Horses trot out more ponies, pigs are pigs again and sharks have a hunger to reproduce more sharks.
Harper wrote “Darwinism and indoctrination” and “Alternatives to evolutionism” in the British education journal School Science Review in the late 1970’s.  He proposed that there were special geological conditions during the Cambrian that favored the fossilization of trilobites for example. A better explanation consistent with biological essentialism (basic types of life vary within limits) is that most of the fossil bearing rocks are part of a Singular Epoch of Rapid Geologic Activity (SERGA). We detail this approach in our book YES: Young Earth Science.
J.R. Downie and N.J. Barron, writing in the Journalof Biological Education, note that, “Harper (1977; 1979) argues against the teaching of science by 'indoctrination' and suggests a number of alternatives to evolutionary explanations that could be used in discussion of species origins.”
Antony Flew (d. 2010) was a leading atheist for many years, but converted to Deism late in life. Flew rejected evolution’s explanation regarding the Origin Of Life (OOL): “How can a universe of mindless matter produce beings with intrinsic ends, self-replication capabilities, and ‘coded chemistry?’”  If evolution is wrong about the start of life, maybe it is wrong about the Universal Common Ancestor (UCA) as well.
1) Harper, G. H. (1977) “Darwinism and indoctrination” School Science Review, 59, 258-268.
2) Harper, G. H. (1979) “Alternatives to evolutionism” School Science Review, 61, 15-27.
3) There is a God by Antony Flew (HarperCollins, NYC, NY, 2007), p. 124.
Special thanks to Francis Schaeffer Hall for the second illustration.