Question: In what decade did the religion that Jacob Miller belonged to develop?

Context articles: Jacob Miller House
Rastafari
Alfred Jacob Miller
King Tubby Meets Rockers Uptown (song)
Jacob Miller (rugby league)
Rockers (1978 film)
King Tubbys Meets Rockers Uptown
Inner Circle (band)
William Drummond Stewart
Jacob Miller (musician)

The Jacob Miller House is a private house located at 307 Jackson Street in Petoskey, Michigan.
 It was placed on the National Register of Historic Places in 1986.
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Rastafari, sometimes termed Rastafarianism, is an Abrahamic religion.
 Classified as a new religious movement, it developed in Jamaica during the 1930s.
 It lacks any centralised authority and there is much heterogeneity among practitioners, who are known as Rastafari, Rastafarians, or Rastas.
Alfred Jacob Miller (January 2, 1810 – June 26, 1874) was an American artist best known for his paintings of trappers and Indians in the fur trade of the western United States.
 He also painted numerous portraits and genre paintings in and around Baltimore during the mid-nineteenth century.
"King Tubby Meets Rockers Uptown" is a dub instrumental track by reggae musician Augustus Pablo, first released under the title "King Tubby Meets the Rockers Uptown" as a single in 1974 on Island Records sublabel Mango Records.
 It was a dub version of the Jacob Miller song "Baby I Love You So", also produced by Pablo.
Jacob Miller is an Australian professional rugby league player who currently plays for Wakefield Trinity (Heritage № 1348) in the Super League competition.
 He can play at halfback or five-eighth.
 He has previously played for Wests Tigers and Hull
Rockers is a 1978 Jamaican film by Theodoros Bafaloukos.
 Several popular reggae artists star in the movie, including Leroy "Horsemouth" Wallace, Burning Spear, Gregory Isaacs, Big Youth, Dillinger, and Jacob Miller.
King Tubbys Meets Rockers Uptown is a dub studio album by Augustus Pablo and King Tubby, released in 1976.
 It features Carlton Barrett on drums, Robbie Shakespeare and Aston Barrett on bass guitar, and Earl "Chinna" Smith on guitar.
 Pablo produced the album and played melodica, piano, organ and clavinet.
 The album was recorded at Randy's in Kingston, Jamaica.
 A distinctly different mix of the title song with vocals and dub, titled "Baby I Love You So", can be found on the Jacob Miller and Augustus Pablo 1975 album, "Who Say Jah No Dread".
Inner Circle are a Jamaican reggae group.
 The group was originally called The Inner Circle Band and formed in 1968.
 The band achieved major success in the 1970s with Jacob Miller as their lead singer, but split up after his death in 1980.
 They reformed in 1986 and had a major hit with the 1987 song "Bad Boys", which serves as the theme song for the long running Spike (formerly Fox Network) television program "COPS".
 They are also well known for their song "Sweat (A La La La La Long)," a big hit in the U.S. in the early 1990s.
 The band is known for blending pop and rock with reggae.
Sir William Drummond Stewart, 7th Baronet (26 December 1795 – 28 April 1871) was a Scottish adventurer and British military officer.
 He travelled extensively in the American West for nearly seven years in the 1830s.
 In 1837 he took along the American artist, Alfred Jacob Miller, hiring him to do sketches of the trip.
 Many of his completed oil paintings of American Indian life and the Rocky Mountains originally hung in Murthly Castle, though they have now been dispersed to a number of private and public collections.
Jacob Miller (4 May 1952 – 23 March 1980) was a Jamaican reggae artist and a Rasta.
 His first recording session was with the famous Clement "Sir Coxsone" Dodd in the late 1960's.
 While pursuing a prolific solo career, he became the lead singer for reggae group Inner Circle.
 Miller recorded and toured with Inner Circle until he and his son died in a tragic car accident in 1980.
 Miller was only 27 years old.