The question of causality is complex. For some philosophers and physicists, time might not exist. And since cause-and-effect reasoning needs the concept of time - of one thing preceding another - the effort to establish causality is a mug's game, an infinite regression of increasingly unanswerable questions.
The CIA's always-useful World Fact book says that a staggering 6.3 million Colombians have been internally displaced (IDP) since 1985, with 'about 300,000 new IDPs each year since 2000,' the year Bill Clinton enacted Plan Colombia. Added up, that's 2.4 million people during Clinton's eight-year presidency.
Most critical histories of U.S. involvement in Iran rightly began with the joint British-U.S. coup against democratically elected Prime Minister Mohammad Mosaddegh in 1953, which installed Pahlavi on the Peacock Throne. But it was Kissinger who, in 1972, greatly deepened the relationship between Washington and Tehran.
Is Donald Trump a fascist? It's an interesting question that has generated insightful commentary over the past few months, with the best answers situating Trumpian illiberalism within America's long history of racial oppression, slavery, Jim Crow apartheid, and the ongoing backlash to the loss of white privilege.