“Instant Karma” (also known as “We All Shine On”) was Lennon’s third solo single (that is, single as a non-Beatle – although George Harrison contributed electric guitar, piano and backing vocals), and the first to be a great success. It sold over a million copies in the US alone, and was a top ten hit in eleven different countries. It was also one of the quickest produced songs of all time, taking literally only ten days from recording to release (February 6 was its debut in the UK).
Like much of Lennon’s work, it is a vague hippie anthem, raising philosophical questions and radiating optimism – although not without its sly touches, such as the lines “Get yourself together / Pretty soon you’re gonna be dead”. Two months later, Paul McCartney would announce the official end of the Beatles, but until them, “Instant Karma” would compete with “Let It Be” (the second last Beatles single) on the charts.
It’s not clear exactly when Cain murdered Abel in any biblical chronology I’ve been able to find. Some of them even date it to 4004 BCE, the same year usually given for the Creation of the earth. Which implies that not only were Cain and Abel both full grown men in the space of a single year, but that their mother’s two pregnancies (Cain and Abel were not twins – Cain is the older), also took place in that same year.
Nevertheless, as brothers, they didn’t always get along. This may or may not have had something to do with the notoriously fickle and hard to please deity that they worshiped, or that deity’s changing of the rules on them – Cain presumably would not have made an offering that God (who is, according to the Gospel of Luke, Cain’s grandfather) that God found unacceptable had he known ahead of time that it would be rejected.
Cain responds to his rejection by God by hunting and killing his brother, Abel. (Which makes him sound a little older than >1 – about 16 or so, I would guess.) And then God, not done with the mind games, pretends not to know about it and questions Cain, leading to his infamous declaration that he was “not his brother’s keeper” (which is a rare concession to historical accuracy by the Book of Genesis – cricket had indeed not yet been invented). God curses Cain and exiles him, making him the earliest biblical figure to be set up and knocked down by God.