I know nothing of theory but I'll put in my $.02.
ALL pop/country/rock songs are really structured around a 1-4-5 progression.Assuming use of diatonic scale. The variance comes in the use of the 2-3-6-7.
The 2m is just a substitute for the 4
The 3m is just a substitute for the 5
The 6m is just a substitute for the 1
The 7dim is just a transition chord.


John
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