First, don't worry: this book does not make Who's Bigger? redundant. We address different questions, about different people, in different ways, with different styles. But if you liked Human Accomplishment, you're going to love our book. :-) There are two basic similarities:
- Both books measure the historical magnitude of important figures statistically, through analysis of the written record left behind in books and reference works.
- Both books quest for themes of broader significance, while simultaneously enjoying the parlor-game thrills of deciding who ranks where.
We will give a more thorough analysis in future postings, but it seems useful to record quick impressions of the similarities and differences of our respective books.
The ranking methodologies are similar in spirit but differ substantially in how they were done. When writing his book between 1997 and 2002 Murray had access to an important lost technology, called a "secretary", who could manually curate a spreadsheet-scale data set. By contrast, we are computer scientists who did a Big Data analysis of gigabytes of text. These differences show up in the properties of our rankings:
- We rank 850,000 people in all domains of interest, while Murray is interested in the top 4,000 figures in the arts and sciences.
- We rank figures from the beginning of time until today, while Murray considers only those active before 1950 to eliminate contemporary biases.
- Our rankings permit direct comparisons of significance to people across different domains. Was Shakespeare bigger than Newton? We say yes, but Murray is not as interested in such comparisons.
- Our rankings come from a computational analysis of Wikipedia, where he performs a statistical analysis of mentions in selected books and reference works.
- We identify two different factors (celebrity and gravitas), permitting us to attribute historical significance appropriately for any given figure. Murray is really only interested in the factor we call gravitas.
We are less certain that our own rankings measure virtue unalloyed with notoriety. The cultural biases inherent in depending on the English-language Wikipedia view of the world seem obvious. The serious issues we care about more concern the processes of fame and recall. Are women underrepresented in the historical record? (Yes.) Do textbooks and expert panels do a good job of recognizing historical significance, even in retrospect? (Not really.) How does interest in historical personages fade with time? (In a generally predictable manner over 170 years from birth). We are more interested in historiography -- why are people remembered -- rather than history -- why should people be remembered.
We will soon do a more detailed comparison of our rankings, but my sense is that Murray did a good job at what he sought to measure. Both of our books are proud of the banality of our respective rankings, meaning that we expect the bulk of our readerships will agree with the bulk of where we position historical figures. Our rankings appear to correlate quite highly with his on most of the figures I've checked. I apologize that we did not get to include a discussion of his work in our book, but we hope to have the opportunity to chat with him sometime after our book appears in October.