Court of Appeals for the Seventh Circuit July 31, 2002, 02-1278 (Cigna Healthcare of St. Louis, Inc. v. Timothy N. Kaiser)

POSNER, Circuit Judge.

This appeal from the dismissal of a suit seeking an order to arbitrate requires us to consider the intersection of class actions, arbitration, and

Colorado River

(parallel-proceeding) abstention. Underlying the appeal is a dispute between a group of affiliated corporations (CIGNA for short) and 288,000 (!