The book supports the ideas of early evolutionary thinkers such as Karl Ernst von Baer, Étienne Geoffroy Saint-Hilaire and St. George Jackson Mivart.
"[7] Herpetologist Hobart Muir Smith wrote that the book with its sensationalist title would be highjacked by creationists but it is not against the fact of evolution, only against the Darwinian interpretation.
"[5] Science historian Keith Stewart Thomson gave the book a negative review commenting "Many of the sacred cows that Løvtrup wants to slaughter are either long since dead or merely made of straw.
[9] Biologist Clifford Grobstein wrote that the book was a mixture of ideas, "sometimes illuminating, sometimes naïve, sometimes superficial, sometimes sophisticated, sometimes enormously detailed.
[11] He married Ebba Lund, (a Danish Resistance fighter and later a microbiologist and chemical engineer) in 1944 and they had three children Vita (1945), Susanne (1948) and Anders (1951) before divorcing in 1959.