I am the only member and founder of tribe. Now I need to find way to disband tribe to be able to leave it. How do I do that?
Open the tribe window, then on the upper part menu where it says "Overview", "Profile", "Members" click on "Settings", then scroll down (drag the bar on the right down) and among other things you'll find a red button that says "Disband". That's what you want to click.