WASHINGTON, DC— Among many educators and public officials in the U.S. is a drumbeat for “universal pre-schoolâ€â€”and for government to provide it to all 4-year olds so as to close school-readiness gaps and prepare kids to succeed in kindergarten and beyond.In his newest book, Reroute the Preschool Juggernaut (Hoover Press, 2009), Hoover Institution Senior Fellow Chester E. Finn, Jr. takes strong issue with this conventional wisdom and examines such fundamental questions as: Which children really need preschool that aren’t already getting it? Will a universal program help the kids who need it most? Will it be a costly windfall for...