CARACAS — There is nothing that can really prepare you for the human suffering on display here in Venezuela or the degree to which this country is in a free-fall. As a diplomatic power struggle between Nicolas Maduro and Juan Guaido played out on the world stage at the end of January, I spent hours in Caracas walking around Petare, one of the worst slums in the city. The streets are filled with families picking food from the trash, eating it right there, desperately seeking sustenance. My eye is drawn to one young man with boils all over his legs, the skin overtaken by infection. He gnaws at an almost bare chicken bone while he looks around frantically, as if he is afraid someone would steal it from his hands. My bodyguard, Salazar, is next...