Root movement by fourths is strongest, by thirds smoothest, by seconds most contrasting — all drive chord progressions

The strongest feature of any chord progression is the movement between successive roots. Three types exist: (1) Root movement by fourths — the two chords always share one note in common; provides strong harmonic direction. (2) Root movement by thirds — the two chords share two notes in common; creates very smooth, similar-sounding transitions. (3) Root movement by seconds — the two chords share no notes; maximum contrast and surprise.

Examples

By fourths: C to G (one shared note: G in C and G triads). By thirds: C to Em (C and E are shared). By seconds: C to Dm (no shared notes — maximum contrast).

Assessment

Write a 4-chord progression using root movement by fourths only, then by seconds only, in C major. Describe the difference in energy.