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.
Richard Rolle Richard Rolle (1290/1300– late September 1349) was an English hermit, mystic, and religious writer. He is also known as Richard Rolle of Hampole or de Hampole, since at the end of his life he lived near a Cistercian nunnery in Hampole, Yorkshire. In the words of Nicholas Watson, scholarly research has shown that "[d]uring the fifteenth century he was one of the most widely read of English writers, whose works survive in nearly four hundred English...and at least seventy Continental manuscripts, almost all written between 1390 and 1500."