That's a pretty uplifting type of statement.. But it's pretty simplistic. And really... I don't think it's at all accurate. Whether the forces of evil take over this earth or not... is not in the hands of men and women.
I think I know where you are trying to go with your argument, but there comes a time when direct action is called for.
I will guarantee you that if good people don't get involved in the process of keeping our society civil, it will become less and less civil.
Street crime is function of good people doing nothing out of fear.
I refuse to live my life in fear, and if/when I witness another street crime, I'll get involved to the maximum extent of my capabilities!
If other good people would choose to be good citizens and get involved, a lot of crime would just not happen. The bad guys (and gals) are certainly outnumbered by the good guys 'n gals. All we have to do is not be afraid to get involved and the criminal's jig is up.