In the seventeenth century, in England, a remarkable number of small, religious movements began adopting demonstratively Jewish ritual practices. They were labelled by their contemporaries as Judaizers. Typically, this phenomenon has been explained with reference to other tropes of Puritan practical divinity. It has been claimed that Judaizing was a form of Biblicism or a form of millenarianism. In this thesis, I contend that Judaizing was an expression of another aspect of the Puritan experience: the need to be recognized as a ‘singular,’ positively-distinctive, separated minority.