Bertrand Arthur William Russell was born on 18 May 1872 at Ravenscroft, Trellech, Monmouthshire, Wales, into an influential and liberal family of the British aristocracy. His parents, Viscount and Viscountess Amberley, were radical for their times. Lord Amberley consented to his wife's affair with their children's tutor, the biologist Douglas Spalding. Both were early advocates of birth control at a time when this was considered scandalous. Lord Amberley was an atheist and his atheism was evident when he asked the philosopher John Stuart Mill to act as Russell's secular godfather. Mill died the year after Russell's birth, but his writings had a great effect on Russell's life.