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.
Roger L'Estrange Sir Roger L'Estrange (17 December 1616 – 11 December 1704) was an English pamphleteer, author and staunch defender of Royalist claims. L'Estrange was involved in political controversy throughout his life. Perhaps his best known polemical pamphlet was "An Account of the Growth of Knavery", which ruthlessly attacked the parliamentary opposition, placing them as "dissenting fanatics" and truly beyond the pale.