In Spain, during Franco's dictatorship (1939-1975) the teaching and divulgation of science were subordinated to the Catholic religion and many books defended a theistic and creationistic point of view of biology that accepted a literal interpretation of the Book of Genesis and denied the theory of evolution, especially as it relates to human origin. This article is devoted to the main books and characteristics of this way of thinking which reproduced arguments and metaphors of the pre-Darwinian natural theology, arguing that nature was ruled by God and living organisms were the results of his design.