Lending without interest discourages lending, which is actually really terrible for even pre-modern economies. Money gets hoarded by the rich instead of at least used in some capacity by the rich. Cultures which maintain that absolute stance on interest are often overtaken by similar cultures which do not maintain that stance, because a functioning finance system, even in its most primitive form, is a huge advantage.
Two reasons:
Lending without interest discourages lending, which is actually really terrible for even pre-modern economies. Money gets hoarded by the rich instead of at least used in some capacity by the rich. Cultures which maintain that absolute stance on interest are often overtaken by similar cultures which do not maintain that stance, because a functioning finance system, even in its most primitive form, is a huge advantage.
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Cash money, I see.