The "cardinal revolution" is a term used to describe a period of rapid development of voting theory in the 2000s. Several methods were rediscovered and expanded upon. These methods were Cardinal voting systems which were relatively obscure prior to this. Warren Smith founded the Center for Range Voting jointly with Jan Kok in 2005, after starting rangevoting.org in 2003. Warren promoted Score voting and invented/reinvented several Cardinal proportional representation such as Reweighted Range Voting and Harmonic Voting. In the following decades there was a flurry of new cardinal systems such as STAR voting, Allocated Score, Sequentially Spent Score and the Method of Equal Shares.