One of the earliest recordings that makes use of the words "one love" is The Wailers' (Bob Marley's original group) ska version of the reggae song of the same name One Love, released in 1965.
In 1977, Bob Marley & The Wailers released the updated version on the Exodus album which was named Album of the Century, in 1999, by Time Magazine and his song One Love was designated Song of the Millennium by the BBC.
Bob Marley's One Love became the theme song for Jamaica and has been the song of the country's tourism product for decades now.
We also found queries about why Jamaican people write those two words at the end of a letter.
A contributor of JamaicanPatwah.com submitted the following definition:
"One Love is an expression of unity, one love refers to universal love and respect for all people, regardless of race, social status or any other defining characteristics."