How does scientific progress affect cultural changes? A digital text analysis

We study the effects of scientific changes on broader cultural discourse, two phenomena that the economics literature identifies as key drivers of long-term growth, focusing on a unique episode in the history of science: the elaboration of the theory of evolution by Charles Darwin. We measure cultural discourse through the digitized text analysis of a corpus of hundreds of thousands of books as well as of Congressional and Parliamentary records for the US and the UK. We find that some concepts in Darwin’s theory, such as Evolution, Survival, Natural Selection and Competition, significantly increased their presence in the public discourse immediately after the publication of On the Origin of Species. Moreover, several words that embedded the key concepts of the theory of evolution experienced semantic and sentiment changes—further channels through which Darwin’s theory influenced the broader discourse. Our findings represent the first large-sample, systematic quantitative evidence of the relation between two key determinants of long-term economic growth, and suggest that natural language processing offers promising tools to explore this relation.