and a day, and were not considered to be permanent arrangements. Toward the other end of the spectrum, there are other societies and traditions which consider marriage to last even beyond death and not to be dissolved under any circumstances.   Please review me!  
 :I agree, Seraphimblade. That statement certainly doesn't apply to Eternal Marriage, for instance, and LDS is a pretty large group. I would recommend removal of that statement. Also, the intro as it currently reads: "Marriage is an interpersonal relationship ..." is ungrammatical. "Marriage" is a concept and a social practice. "A marriage" is an interpersonal relationship, though. So I'll go fix that; I hope adding a single letter will be uncontroversial enough. —  —  
 ::One hopes! I think the other sentence probably can be removed, we could clarify it too, but the lead's already getting a little long.   Please review me!  
 :::I support both: transforming the lead into the form, "A marriage is a..." is (as Coelacan suggests) more grammatical. (Having another sentence somewhere that started, "Marriage as a social practice is ..." would improve the article even more.)  Removing the "perpetual agreements" sentence seems fine, though it really comes from a family law POV, which the article is slowly losing. Maybe gathering together all the family law stuff in one section would make sense?