Columbia University history professor Adam Tooze admits that "the ship has sailed," when it comes to who is the engine of the global economy. 

Channel NewsAsia's Olivia Siong talked to Tooze on the sidelines of the World Economic Forum's Summer Davos event in Tianjin. The 20th-century historian explains how Asia, particularly China and ASEAN, are "reshaping the world," and why America is adopting the language of "national security" in an attempt to redefine its trade relations.