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).
John Snow was an English physician and a leader in the adoption of anaesthesia and medical hygiene. He is considered one of the fathers of modern epidemiology, in part because of his work in tracing the source of a cholera outbreak in Soho, London, in 1854. His findings inspired fundamental changes in the water and waste systems of London, which led to similar changes in other cities, and a significant improvement in general public health around the world.