Shèn Dào 愼到 (also written 慎到; c. 350 – c. 275 BCE) was a Warring-States political philosopher of Zhào 趙, who studied at the Jìxià 稷下 academy in Qí 齊 alongside Tián Pián 田駢, Péng Méng 彭蒙, and Sòng Xíng 宋鈃. He is the principal pre-Hán Fēi theorist of shì 勢 (positional power, situational advantage) and is conventionally numbered with Shēn Bùhài 申不害 (theorist of shù 術, “method”) and Shāng Yāng 商鞅 (theorist of fǎ 法, “law”) as the three doctrinal sources Hán Fēi 韓非 synthesized into mature Legalism. His work is described at length in the Zhuāngzǐ · Tiānxià 莊子·天下 chapter, criticized in Hán Fēi zǐ 韓非子 j. 40 (Nán shì 難勢), and cited by name throughout the Lǚshì chūnqiū 呂氏春秋. The Shǐjì 史記 places his floruit at the courts of King Xuān 宣 and King Mǐn 湣 of Qí. The Hàn shū · Yìwén zhì recorded his Shènzǐ 愼子 (KR3j0005) in 42 piān under the Fǎjiā; only fragments survive, recompiled in the Míng. Pre-modern Chinese sources occasionally call him “of Liúyáng 瀏陽,” which Chén Zhènsūn 陳振孫 already correctly rejected as a bookseller’s confusion (Liúyáng was instituted as a county only under the Wú in the Three Kingdoms period). Not in CBDB (which begins with the Táng).