A tribe is a group of people with a similar perspective. In WISDOM, there are five tribes: HIPpy, LIBeral, NEUtral, CONservative, and PATriot. (If you really want to learn about a particular tribe, you can just click on the name in blue; but, I recommend that you stay here and read everything in order.) The purpose of a tribe is to bring together likeminded people. Obviously, a LIB and a CON are not likely to think alike; but, two LIBs are likely to have much agreement between them.
For this reason, everything in WISDOM is arranged by tribes. If you do not belong to a tribe, then you will not have access to many portions of the WISDOM Forum Board; however, you are certainly free to browse THE WISDOM STORE.