Defining Communism and Socialism. To better understand the slippery distinctions between communism and socialism, let's trace the history of both terms. Communism. Communism traces its roots to The Communist Manifesto, an 1848 pamphlet by Karl Marx and Friedrich Engels.
John Snow was born on March 15, 1813 in a house on North Street in York (center left), England, the first of nine children of William Snow (1783-1846) and Francis Snow (Askham) (1789-1860).
In an article in Old News, David Vachon writes of John Snow's life and achievements, and concludes: For his persistent efforts to determine how cholera was spread and for the statistical mapping methods he initiated, John Snow is widely considered to be the father of [modern] epidemiology..