Margaret Thatcher the United Kingdom; despite the passage of time, debate over the complicated legacy of Thatcherism persists. Margaret Hilda Roberts was born on 13 October 1925, in Grantham, Lincolnshire. Her parents were Alfred Roberts (1892–1970), from Northamptonshire, and Beatrice Ethel (née Stephenson, 1888–1960), from Lincolnshire. She spent her childhood in Grantham, where her father owned two grocery shops. In 1938, prior to the Second World War, the Roberts family briefly gave sanctuary to a teenage Jewish girl who had escaped Nazi Germany. Margaret, with her pen-friending elder sister Muriel, saved pocket money to help pay for the teenager's journey. Alfred Roberts
Isaac Newton author of the manuscript "De analysi per aequationes numero terminorum infinitas", sent by Isaac Barrow to John Collins in June 1669, was identified by Barrow in a letter sent to Collins in August of that year as "[...] of an extraordinary genius and proficiency in these things." Newton later became involved in a dispute with Leibniz over priority in the development of calculus (the Leibniz–Newton calculus controversy). Most modern historians believe that Newton and Leibniz developed calculus independently, although with very different mathematical notations. Occasionally it has been suggested that Newton published almost nothing about it until 1693, and did