Despite hard work by both governments to overcome mistrust, more is needed to build mutual understanding between Americans and Mexicans. Educational partnerships may hold the answer.
Bashar al-Assad, Vladimir Putin and Recep Tayyip Erdogan have a long history as leaders of their countries and players in the Syrian war.
The idea of effective world governance seems highly unlikely, but it's an idea we must keep returning to.
The Trump circus has distracted from genuine scrutiny of Hillary Clinton's approach to global challenges if she becomes president - and the signs are not good.