The document discusses the historical relationship between physicians and the tobacco and opioid industries. It describes how doctors were once commonly featured in tobacco advertisements and how medical organizations accepted funding from tobacco companies. It has now been established that smoking is hazardous to health. The role of physicians in the current opioid crisis is now under scrutiny, as they had a role in overprescribing opioids. The document asks students to compare the situations, discuss their similarities and differences, and analyze whether the conduct of doctors was morally equivalent in each case using the concept of moral equivalence.