The Supreme Court today struck down a class action for 1.5 million women who claimed that Walmart Stores based employment decisions on gender. Wal-Mart Stores, Inc. v. Dukes, No. 10-277 (U.S. June 20, 2011).

The Court ruled 5-4 that no "common" questions existed under Rule 23(a)(2) because the plaintiffs didn't offer proof of a discriminatory company-wide policy.