What could happen if we don't become responsible people

If people stop taking responsibility and just keep on doing things, without realizing or even after realizing that, what one is doing is effecting others and after doing our job, if we shrug our shoulder, that it is not our responsibility or we have nothing to do with it, will surely lead to a world where, we will, our self be responsible for our downfall, just like virus or cancer cell does not realize that its unsatisfiable desire to grow without any check or responsibility will ultimately lead to its own death.

there is link to a video which I find is from a person who is lot more aware about the result of ignoring the effects of our individual actions.