You're pretty sharp for a youngin. Just keep reading, learning, and evolving your train of thought. You have great punctuation for a 15yo.
Just a piece of advice: You say most people your age don't think for themselves. I used to think the same thing. Then I realized that most PEOPLE don't think for themselves, regardless of age. Keep your eyes open and keep being as objective as possible. You already seem to have a head start (all I cared about at age 15, was cars and street racing). Spend the next few years watching the world make its mistakes and advances, and learn from them.
"The first lesson of economics is scarcity: there is never enough of anything to fully satisfy all those who want it. The first lesson of politics is to disregard the first lesson of economics." Thomas Sowell