Abstract
This chapter surveys the variety of ways in which people who may appear at first to be bystanders, or mere bystanders, to wrongdoing, harm or danger might instead share responsibility with other actors. My discussion divides cases into three rough, non- exclusive categories: (a) shared responsibility for wrongs and harms; (b) shared responsibility to provide aid; and (c) shared responsibility to enforce moral norms. The third category has received the least discussion to date. My modest goal for this portion of the chapter is to highlight some ways in which the responsibilities of witnesses to wrongdoing need to be more thoroughly theorized. But, furthermore, I want to suggest that these cases show that active bystanders are not always preferable to passive ones. Sometimes, it is better for witnesses to wrongdoing to remain mere bystanders.