Throughout many centuries of record human history, it has been observed that that the pen of a writer is mightier than any wielded sword. That age-old saying has taken on a great deal more "truthiness" in a world where rapidly evolving social media provides us with instant worldwide communications. that power belongs to all of us, no matter who we are or where we come from. Rich and poor alike can test what they think and/or believe in a limitless arena of give-and-take that proves what we say.
Some ideas really do stand the test of time in a "good" way. Treat others how you want to be treated, never diminish another person's dignity, and--you get the idea. You already know this stuff by heart, there is always a chance the other guy is right. Even when they aren't, you can still make your case for what you believe in by talking about the process of something that has happened in the past and how those events turned out. Chances are that somebody somewhere has already done something like what matters to you. If those events didn't work out well for them, you've got some clue that the decisions they made are not the choices you should make.
Americans have a bad habit of being unaware of their own history, we so almost never stop to realize that it's been more than two centuries since British forces burned our capital during the War of 1812. As infamous as he was, Senator Joseph McCarthy ignited the "red scare" for the sake of his own political ambitions more than six decades ago. Trauma he in inflicted has never completely faded, the same dark forces that idealized Hitler seem to have blinded us to the miracle of our survival and the danger of current threats.
As writers of history and various fictions, many of us have the power of the pen I mentioned earlier. Cautionary tales allow us to speak with a voice that will outlive us when those books go in to print. Even as e-books, those words have the power to travel fast all the way around an uncertain world--even if you never do. Your heroes and heroines are what you make them to be, they live and die for what you make them believe in. Your villains can embody all the evils you stand against, even if they carry out their crimes with style. Stories that bear some resemblance to the times you live in allow future generations to "read between the lines." They'll know what you meant, if if you didn't say it directly. No tyrant has ever been able to defeat the printed word, not even yours.