How can the common person create change for an entire community?

The common person can create change for an entire community by coming up with solid and realistic projects that enhance people's awareness of a problem.

Explanation:

To change an entire community as a common person is nearly impossible; however, we can make a significant change that allows people to reflect on their behavior, and at least, changing someone's mind. This change can be made by making solid projects that truly reach awareness on citizens, such as a good spokesperson, valid arguments, activities that people can enjoy while learning, and the most important one, sharing your reasons and thoughts with kids and the people around.

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.  

yes you could be a life guard if that the question.