Sentence:  ... a Man may as easily know where to find one, to teach him to Debauch, Whore, Game, and Blaspheme, as to teach him to Write, or Cast Accompt: 'Tis their Support, and Business; nay, their very Profession, and <WSD>Livelihood</WSD>; getting their Living by those Practices, for which they deserve to forfeit their Lives. 
Meaning of the word marked with <WSD> tags:  A means of providing the necessities of life for oneself (for example, a job or income). (from 14thc.)