How do you explain the bond between man and wife? Well, for one thing, it's private. What people do in their own marriage is their own business.
I believe it is still true that conflicts among major powers usually stem from geopolitical rivalries but rarely from economic competition.
Part of the joy of music is listening to lots of different kinds of music and learning from it. Specifically for me, I like writing songs that move me, and what moves me are beautiful songs on the piano or the guitar and really, really heavy music.