[Theory] "Stability"

[Det_Nosnip]

Ok, so I came across the following text in my theory book:

"Of the four triad types, the major and minor triads have the greatest stability. Because of this, they have traditionally served as points of musical repose, or resolution, appearing at the ends of compositions or sections within compositions. Stability is directly related to intervallic makeup. In the major and minor triads, the interval formed by the root and fith is a perfect consonance; this is not the case with diminished and augmented triands."

I kind of understand what the author means, but could anyone possibly elaborate? How does everyone feel about this?

[Diatonic Dissonance™]

Uh, I can explain it to you, but could you possibly highlight which parts don't make sense to you?

[Ned]

Ok, so I came across the following text in my theory book:

"Of the four triad types, the major and minor triads have the greatest stability. Because of this, they have traditionally served as points of musical repose, or resolution, appearing at the ends of compositions or sections within compositions. Stability is directly related to intervallic makeup. In the major and minor triads, the interval formed by the root and fith is a perfect consonance; this is not the case with diminished and augmented triands."

I kind of understand what the author means, but could anyone possibly elaborate? How does everyone feel about this?

Is this Piston/Devoto?

[Diatonic Dissonance™]

OMG NED!

What's up?

[SoleFactionBassist]

It means that the major and minor chords are more stable because the Perfect 5th, such as C-G provides a very "stable" foundation and then the third is what gives the chord it's character, minor or major, thus minor or major 3rds involved. It's the banana split analogy. Without the banana you only have the topping and the topping only does not make the desert as desirable. You need the banana for the bass, the "stability" thus the fifths in major and minor triads.