Law of Population was a treatise written  as a response to works on population growth by an English cleric and what?
Thomas Robert Malthus Thomas Robert Malthus ( ; 13 February 1766 – 29 December 1834) was an English cleric and scholar, influential in the fields of political economy and demography. Malthus himself used only his middle name, Robert.
Francis Mason (priest) Francis Mason (c.1566–1621) was an English churchman, archdeacon of Norfolk and author of "Of the Consecration of the Bishops in the Church of England" (1613), a defence of the Church of England and the first serious rebuttal of the Nag's Head Fable put about as denigration of Matthew Parker and Anglican orders.