WASHINGTON — DeVry Boughner Vorwerk’s speech to global development experts in the nation’s capital last week was a call to action.Global trade, said Cargill’s chief of global corporate affairs, can be a development tool that promotes the environment, education and equality. But only if people and organizations become activists willing to work with one another.“Without our leaders sitting around the table together,” Vorwerk warned, “isolationism becomes the order of the day.”Cargill, the Minnesota-based agricultural and shipping giant that has facilities in Cedar Rapids and is one of the world’s largest private companies, has emerged as a leading voice in support of global trade as President Donald Trump imposes protective tariffs on other countries.Vorwerk spoke at the Devex 2018 sustainable development exposition three days after Trump broke with U.S.