The principles of one person, one vote (OPOV) and representation by raw population are rock-solid under U.S. constitutional law; by upholding them, the Supreme Court changes nothing, but instead reinforces well-established precedent. The court has consistently rejected efforts by the states to alter voting laws in ways that deliberately favor certain groups over others. The latter, it should surprise no one, are typically poor, urban, less white than the population at large. This was a good decision.