Globalisation has become a buzzword that typically refers to the intensifying integration of the world economy, especially as midwifed by technological advances. It also implies a growing political and cultural sense that all humanity is globally interdependent. There have always been individuals of course who have advocated such awareness, one of them being the founder of the Baha'i faith, who formulated a spiritual equivalent as the religion's central doctrine in the late 19th century: Ye are the fruits of one tree, and the leaves of one branch. Its emphasis on global unification made...