The Major 3rds Cycles - Descending & Ascending
Pioneered by the iconic John Coltrane, the descending version of this cycle has become commonly known as "Coltrane Changes" (on which his tune "Giant Steps" - among others - is based). At the same time, the ascending cycle - coined here as "Retrosteps" - has been explored to a far lesser degree.
The original intention, as in Coltrane's case, was his use of this cycle as a substitution for the common ii-V7-I harmonic movement. While harmonic resolution in Perfect 4ths / 5ths (Cycle of 5ths) is the foundation on which Western harmony is based, both descending and ascending Major 3rds Cycles offer creative alternatives.