Adam Two Sons were Farmers and Shepherds u know that, named Qa'in(Cain) the nomad or shepherd vs the good one abaal or abel in European world was a farmer. Well the good n bad traditions of two sons is highly in Abel favor due to agricultural communities worldwide seeing him as someone who was a hard worker, toiled the land, got very little reward from harvests just petty vegetables, and was loyal to God and had patience in such poverty.
Ironically those communities ended up creating xivilizations and community work spirit or village mindset.
While Qa'in was blessed with independence and freedom being a lone shepherd, has his hanti, has fruits from trees, doesn't need to do backbreaking work for little vegetable type rewards mentality.
He did develop more intelligence also as he had to rely on himself not have such big communities congregated in farming villages or towns. He was a Bedouin basically lol
He plotted to kill his brother Abaal saying he was weak, just toiling land and called him a slave probably and just following daddy adam instructions to work hard and allah will reward u but allah wasn't responding so he came up with the murder u see today and every evil vice mankind does has him as the origins.
His a Qa'in and u will notice Somali geeljires r notorious 4 it too.