Acoustic instruments.
Simple chord progressions such as C-F-G or Am-G.
Simple time signatures such as 3/4 or 4/4.
"Sharp" or natural keys such as C, D, E, G or A.
Simple scales such as pentatonic minor (blues), pentatonic major, major, melodic minor and mixolydian.
The Constitution states that a government should have all the powers to carry out its duties, and the national bank was necessary."
The mid -1900’s was when it’s began to increase