RALEIGH — Are we on the brink of World War III? Not necessarily, argue the coauthors of a new book, so long as we do what is necessary to deter revanchists threatening peace and freedom around the world. But America and its allies have already entered a new Cold War with the CRINK Axis — China, Russia, Iran, North Korea, and their client states in Eurasia and Latin America — and policymakers inside and outside Washington need to understand fully its implications.