Introduction to “The Woodward-Hoffmann Rules. From May 5, 1964, to November 30, 1964”**

An introduction is provided to Publication 11 in the series of articles by the author on the history of the Woodward-Hoffmann (W−H) rules. Now permanently open access (CC-BY) at http://pubs.acs.org/doi/abs/10.1021/acs.joc.5b01792 , Paper 11 was published in 2015 in The Journal of Organic Chemistry to celebrate the 50th anniversary of the W−H rules. This paper summarizes the content of Publications 1–10 in the series and provides an idea of the major components of Publication 11.