There are over four-and-a-half billion adherents of the world's religions. Christianity, a proselytizing tradition, has spread globally until there are nearly two billion Christians today, over half of whom are Roman Catholic, while about a quarter of Christians are in various Protestant denominations and half of the remainder are in the traditions of Eastern Orthodoxy. The other actively proselytizing religion, Islam, has a billion adherents around the globe with Indonesia being the most populous Islamic nation. Hinduism itself has nearly one billion adherents, while Buddhism has about three hundred and fifty million. Important smaller traditions today include twenty million Sikhs, fourteen million Jews, six million Baha'is and perhaps four million Jains, not to mention the indeterminate millions who are influenced today by Confucian thought. Indigenous traditions, such as those originating in Africa, make up the remainder. This remarkable panoply of living traditions, with their central place on the world stage, bring valuable and divergent perspectives and resources to the question of the meaning of life, for they carry wisdom which has been tempered by centuries and strengthened by the testament of devout lives.