GRAND RAPIDS, Mich. — Cannon Township has filed a lawsuit against one of the world’s largest consulting firms for “knowingly perpetuating the opioid crisis.’’ The federal lawsuit against McKinsey & Co. comes more than two months after Michigan and other states reached a $573 million settlement with McKinsey, which helped opioid companies promote their drugs. “McKinsey’s method of aggressive marketing of opioids to prescribers has demonstrably exacerbated the opioid crisis,’’ the lawsuit claims. “McKinsey continued consulting to increase the sale of opioids despite the nationwide epidemic.’’ Cannon Township is located in Kent County and bills itself as "one of Michigan's most scenic and enjoyable places to live and visit.'' Cannon Township Supervisor Steve Grimm declined comment, as did the attorney who filed the class action complaint. Several cities and counties in the U.S. have filed similar action against McKinsey, alleging it worked with pharmaceutical manuf...