John Maynard Keynes was born on the 5th June, 1886 in Cambridge, England. His father was an economist and a lecturer at the University of Cambridge. His father's love towards economics greatly influenced Keynes when he was growing up. In 1911 he was made the editor of the Economic Journal- Britain's foremost economics publication. After being the principal representative of the British Treasury at the Paris Peace Conference in Versailles in 1919, he wrote 'The Economic Consequences of the PEace' in which he wrote about how it is impossible for Germany to pay the amounts demanded of it.' He is most known for the Keynesian economics. His views on the economy can be easily described as the opposite of 'laissez faire'. "In economics, laissez-faire describes an environment in which transactions between private parties are free from state intervention, including restrictive regulations, taxes, tariffs and enforced monopolies" (wikipedia).
Keynes promoted the idea that the government should intervene in the economy to fill the gap.