LB, there seems to be some confusion over a definition of heroism. Some previous respondents want to conflate heroism with being a good role model. While there is, of course, considerable overlap, not all legitimate heroes are suitable role models. Likewise, many truly excellent role models may not be particularly heroic.
Not believe in heroes, LB? Preposterous! Thank G-d there have been heroes in Yisrael who arose in time of need and did great things. There are heroes among us now who are moser nefesh for Torah and Klal Yisrael and G-d willing, new heroes will arise when we need them. You could be one of them.