In what ways do individuals make a difference in our society?

With many individuals living in one society, there are bound to be some disagreements about the way things are, and there will always be those who will try their hardest to make a difference in their society, or even attempt to change it. The reason for this, is that people don't agree with the way their society is run, and want their society to be better for everyone to live in. They attempt to make a difference by organizing protests, starting petitions, or having a talk with city officials. Sometimes these tactics work, while sometimes they do not. However, whether they succeed or fail, their efforts are noticed by others and can have a big effect on them, maybe even causing them to join their cause and increase their numbers.