Are we all in fact spir­i­tu­al? Is this term sim­ply a vague, redun­dant descrip­tion?

A read­ing list for this top­ic is online at http://thormay.net/unwiseideas/DiscussionTopics/SpiritualPeople.htm  (Sug­ges­tions for addi­tions are wel­come)