Countless classic songs have been built using familiar combinations of relative major and minor chords. As you may know, if you start from a major chord, for example, G, its relative minor is rooted three half steps lower; in this case, that would be Em.
Likewise, if you start from a minor chord, say, Am, its relative major chord is three half steps higher; in this case, that would be C. Songs such as the Beatles’ This Boy, John Lennon’s Instant Karma, Neil Young’s Rockin’ in the Free World, Pink Floyd’s Wish You Were Here, Tom Petty’s I Won’t Back Down and many others are built from the shifting axis between relative major and minor chords.
