Huge roots reggae Spotify playlist with almost 4,000 roots reggae tracks.

Wikipedia on roots reggae:

"Roots reggae is a subgenre of reggae that concerns itself with the spiritual side of Rastafari and with the honoring of their God, Jah. It also is identified with the life of the ghetto sufferer, and the rural poor. Lyrical themes include spirituality, poverty, Black pride, social issues, resistance to government and racial oppression, repatriation, and Rastafari. The heyday of roots reggae is usually considered the latter half of the 1970s – with singers such as Johnny Clarke, Cornell Campbell, Bob Marley, Peter Tosh, Burning Spear, Max Romeo, Horace Andy, Hugh Mundell and Lincoln Thompson, and groups like Black Uhuru, Steel Pulse, Israel Vibration, The Gladiators and Culture – teaming up with producers such as Lee 'Scratch' Perry, Bunny Lee, Joseph Hoo Kim and Coxsone Dodd. The experimental pioneering of such producers within often-restricted technological parameters gave birth to dub, and is seen by some music historians as one of the earliest (albeit analogue) contributions to modern dance music production techniques. Roots reggae also became very popular in Europe in the 1970s, especially among left-wing white youths in Western Europe. When Jamaicans turned to dancehall, a lot of black, white and mixed roots reggae bands were formed in Europe. Later on roots reggae also made its way into the United States with the mass migration of Jamaicans to New York. This took place with the reforms made to American immigration laws in the early 1960's. Along with localized traditions and food, reggae music was inevitably brought as well, contributing to the New York City soundscape. "

And here are a bunch of sample tracks from the playlist:

• Bob Marley & The Wailers - Buffalo Soldier
• Bob Marley & The Wailers - Could You Be Loved
• Bob Marley & The Wailers - Redemption Song
• Bob Marley & The Wailers - Jamming
• Ky-Mani Marley - Ghetto Soldier
• Bob Marley & The Wailers - I Shot The Sheriff
• Ky-Mani Marley - Hustler
• Bob Marley & The Wailers - No Woman No Cry
• Max Romeo - I Chase The Devil
• Bob Marley & The Wailers - Stir It Up - Original Album Version
• Toots & The Maytals - Funky Kingston
• Junior Kelly - Rasta Should Be Deeper
• Bob Marley & The Wailers - Satisfy My Soul
• Bob Marley & The Wailers - Exodus
• Ky-Mani Marley - One Time
• Bob Marley & The Wailers - Punky Reggae Party
• Peter Tosh - Johnny B Goode
• Bob Marley & The Wailers - Turn Your Lights Down Low
• Black Uhuru - Chill Out
• Peter Tosh - Bush Doctor
• Jimmy Cliff - The Harder They Come
• John Holt - Police In Helicopter
• Ky-Mani Marley - The March
• Capleton - That Day Will Come
• Ky-Mani Marley - I'm Back
• Toots & The Maytals - Sweet And Dandy
• Desmond Dekker - 007 (Shanty Town)
• Peter Tosh - Mama Africa
• Steel Pulse - Chant A Psalm
• Bob Marley & The Wailers - Zion Train
• Junior Murvin - Police & Thieves
• Toots & The Maytals - Louie Louie
• Bob Marley & The Wailers - Forever Loving Jah
• The Gladiators - Stick A Bush
• Max Romeo - One Step Forward
• Tarrus Riley - She's Royal
• Bob Marley & The Wailers - Zimbabwe
• The Congos - Fisherman
• Ky-Mani Marley - So Hot
• Bob Marley & The Wailers - One Drop
• Gentleman - Different Places
• Bob Marley & The Wailers - Bad Card
• Steel Pulse - Your House
• Burning Spear - Hail H.I.M
• Bob Marley & The Wailers - One Love (People Get Ready)
• Peter Tosh - Wanted Dread And Alive
• Don Carlos - Young Girl