Two papers (1924 & 1926) in this publication disclose the main formulations arising from the definition of humankind that Korzybski developed earlier in his book Manhood of Humanity. Viewed historically, they represent a bridge between Manhood of Humanity and Science and Sanity. Scanned from the seventh printing, this searchable PDF concludes with a short note by Irving J. Lee. Searchable PDF. 97 pages. 26 MB filesize.