This is interesting.The issue in Ro 5:12-14 is accountable guilt/death by transgression of the law, the cause of all personal guilt/death.
Transgression of law (= death) requires there be 1) law with 2) death penalty, as in the Garden (Ge 2:17),
and which there was not between Adam and Moses, yet all died.
When you say "death by transgression of the law" are you deriving this just from the referenced verses?
Am I understanding you correctly re: Adam in the Garden?
- In the Garden God commanded Adam not to eat and issued a death penalty, so we have [spoken] law (command + penalty)?