{ 1 } - Jesus Christ
{ 2 } - Rabbi Hillel
{ 3 } - Confucius
{ 4 } - Baha'i, Buddhism, Hinduism, Islam, and Taoism
{ 5 } - all of the above

All the major world religions endorse GR and many put it at the center of how we are to live. Jesus Christ and the Rabbi Hillel, for example, used it to summarize the Jewish Scriptures; and Confucius used it to summarize his teachings. GR is the wisdom of the ages -- not the fad of the moment.