Divided G20 should draw historical lessons for universal security

Although the diplomatic tensions over a South African land restitution law that the Donald Trump administration has labeled land "confiscation" and unfair to whites seem to be the factor that prompted US Secretary of State Marco Rubio's boycotting of the G20 Foreign Ministers' Meeting in Johannesburg on Thursday, the absence of the top US diplomat had in effect saved an awkward moment that the deepening of rift between the US and its allies over Ukraine crisis is exposed to be unstoppable.