Contrary to conventional wisdom, results revealed that at least one bystander intervened in approximately 91% of situations, with an average of 3.76 individuals intervening per video. This pattern was consistent across all three national contexts. Further, the number of bystanders present at a conflict was positively associated with the aggregate likelihood of someone intervening.
Source: Cross-national CCTV footage reveals that bystanders intervene in 9 out of 10 public conflicts
People are better than the media might lead you to believe.