If you are not ready to speak up with a blog, or to write an op-ed for a newspaper, you still can express yourself without as much as writing a word.
Take Facebook for example, you can like or share a post you find agreeable. You can retweet a tweet a tweet or forward an email that you think is good for the world.
All of these take just one click and require no writing.
Do it now. Don't continue to be silent.