so i thought about your answer and how maybe it could fill some holes in my theory, like how Gsus4 likes to go to G, or how Eaug7 likes to go to E7 before it goes to Am, but ultimately i do not understand why what you said would be true. i know it was a long t
 ime ago 
 but if you could explain why you might have said that i would appreciate the closure
in your first question you didn't give any specifics, you just said ' i think major 3rds might be like the most important thing in the world' . And i believed you, but also true is things like wheels, tables, apples, and so on, could also be similarly thought of as 'the greatest thing in the world'. and probably to have a nice good world you'd probably need a little bit of them all. What you just gave above is wonderful. this has nothing to do with what i had in mind about major seconds being so useful. Melodies come to mind, when thinking about how 'important' major seconds are. And actually, when you first said 'wow major thirds are like really important', my mind immediately went to melodies (you didn't specify what you really meant, like you didn't specify that you were talking about harmonic resolutions, etc) so yeah, i sort of had to guess what you were talking about, and my mind went to melodies. in which case i think it's easy to see why min 3rds and maj 2nds together are hugely important for that game. maj2nds being an absolutely essential building block of anyone's melody kit