What is the origin of sin and death in the Bible? Who was the first sinner?This essay summarizes a 2017 BAR article by John Byron. The article itself is behind the subscription wall, but the essay has some points of interest.
To answer the latter question, today people would probably debate whether Adam or Eve sinned first, but in antiquity, it was a different argument altogether. They debated whether Adam or Cain committed the first sin.
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