Clark was born at 32 Grosvenor Square, London, the only child of Kenneth Mackenzie Clark (1868–1932) and his wife, (Margaret) Alice, daughter of James McArthur of Manchester. The Clarks were a Scottish family who had grown rich in the textile trade. Clark's great-great-grandfather invented the cotton spool, and the Clark Thread Company of Paisley had grown into a substantial business. Kenneth Clark senior worked briefly as a director of the firm and retired in his mid-twenties as a member of the "idle rich", as Clark junior later put it: although "many people were richer, there can have been few who were idler". The Clarks maintained country homes at Sudbourne Hall, Suffolk, and at Ardnamurchan, Argyll, and wintered on the French Riviera. Kenneth senior was a sportsman, a gambler, an eccentric and a heavy drinker. Clark had little in common with his father, though he always remained fond of him. Alice Clark was shy and distant, but her son received affection from a devoted nanny.