A change in the default crude oil transactional currency - which for decades has been the "Petrodollar", blessing the US with global reserve currency status - would have monumental consequences for capital allocations and trade flows.
http://www.zerohedge.com/news/2018-03-31/china-plans-pay-oil-imports-yuan-instead-dollars
Realist - Everybody in America is soft, and hates conflict. The cure for this, both in politics and social life, is the same -- hardihood. Give them raw truth.