Can one person make a difference?

I believe that one man can sometimes make a difference. For example lots of people have made a difference from protesting. Martin Luther King used peaceful protest and changed the opinions of thousands of people. Whereas on the other hand Hitler made a difference by making people believe in the wrong things, like the 'superior_race' and the Jews being described as a disease that needed to be killed. Or, in other cases celebrities can make a difference. Singers/actors/models, idols to ordinary people sometimes change the way they think about things. For example Michael Jackson tried his hardest to change the world, stop polluting the planet and stop racism by creating songs around these subjects. Or celebrities can start trends, which involves some people in changing their appearance. Another example of one person making a difference is a teacher; a teacher educates pupils and so makes a difference by allowing them to have knowledge and so a better life for the future. On a_smaller scale a difference can be made by a single person by collecting donations (in any form) in your neighbourhood and give them to a local organization or make the people around you aware of an issue you are passionate about (like the environment or people who are homeless). When you show your passion for an issue, people can take it more seriously andossibly get passionate, too.