I believe that the daily actions of average people have significant impact on the course of history. First of all, the United States citizens elected Barack Obama. Average people showing up at the polls demonstrates that average citizens care about our country and the new direction we would like our country to take.
Looking back as far as the American Revolution, average, everyday citizens formed the "Sons of Liberty" and created a new country independent of Great Britain, and signed the Declaration of Independence on July 4, 1776. Average citizens fought the American Revolution, and average citizens supported the movement to abolish slavery, beginning with their participation in the Underground Railroad. Average citizens participated in marches for more Human Rights for minorities in the 1960s. Many people feed the hungry and homeless at soup kitchens all over the country,..and not just in the U.S. Mother Theresa and her sisters fed the hungry in Calcutta every day. They were average people doing extraordinary things.
Each day, "average" people live out their lives according to what they care about most. Most people behave in ways that reflect their personal priorities. Those who feed into media propaganda watch lots of television. Others who would like to return to a simpler lifestyle shut off the television and grow food in backyard gardens and spend more time outside. Those who care about sports play on teams and attend games. Those who care about music gather in groups to play and attend concerts.
Overall, the math adds up. The more people who are willing to put what they care about most into action (or refraining from action that supports the groups they would like to see lose power), the less the groups who would impose their will on others may have a hold on a large group of average citizens. More people may need to care to reach the "tipping point" that favors the survival of our planet and our species at a level where it is noticeable, but the more people who believe that their actions matter, the more will take action and align their lifestyle with more earth-friendly means of completing everyday tasks.
Local newspapers often cover stories in the smaller sections that are worth paying attention to. Those stories are usually about people whose actions are making a positive, lasting impact on the lives of others, young and old.