Sikhism traces its beginnings to Guru Nanak, who was born in 1469 and died in 1538 or 1539. With the life of Guru Nanak the account of the Sikh faith begins, all Sikhs acknowledging him as their founder. Sikhism has long been a little-understood religion and until recently they resided almost exclusively in northwest India. Today the total number of Sikhs is approximately twenty million worldwide. About a million live outside India, constituting a significant minority in the United Kingdom, Canada, and the United States. Many of them are highly visible, particularly the men, who wear beards...