END OF The World?

Most people believe the world will end one day.. right? People say an astroid will kill us, or global warming will kill us all. Well i believe that one day the human population will be completely wiped out. Since bacteria evolves very rapidly, they are becoming immune to our medicines. I think humans will be back to the drawing board one day with finding a cure to anything or treat anything. M amounts of people will die. Food sources could become infected, killing off populations at a time. Countries won't allow other people into their own borders in fear of spreading. Government will try to isolate people, but with the ratio of civilians to gov, they will be overthrown. Gov will have one answer, bomb them. They do so, and people die. Less workers, destroys the country completely. No more food for humans. Most of the race dies off. Only a few survive for a few years until they die from being isolated in different regions of the world. Is this possible?