Okay, first off, I'd like to point out that this is Philosophy of Freedom and does not have to do with anything political. So this has nothing to do with government or freedom in society. That is a slightly different branch of philosophy (and I might start a thread about that later if this one turns out good). I would also like to point out that this also has nothing to do with religion either, which is also a slightly different branch of philosophy. I won't start a topic about that here since I think that might start a fight.
Now that that's out of the way, here are the questions for this:
1. What is freedom?
2. Does freedom exist in a universe governed by natural laws?
What the second question means is: Are you free to, instead of driving to work (or school), fly there instead? And I don't mean on a plane/helicopter/jetpack. I mean actually flapping your arms and flying there. The answer is: of course not. Humans can't fly on their own; they aren't built to. So, are you truly free, then? Even though there are certain natural laws preventing you from flying on your own even if you wanted to, are you still free?
This kind of philosophy also goes over a few other things, and I'll put up some arguments concerning it if you're interested (you may decide that you agree with one). If not, then go ahead and ignore.
[SPOILER="Spoiler"]
The first kind of argument is called determinism. It simply says that everything happens by necessity (the world influences us). We don't really notice the world influencing our decisions and so we only think that we have freedom, but we don't. The original concept stated that determinism and free will could not exist at the same time. However, they later stated that determinism and free will are compatible with each other (otherwise known as compatibilism).
There are a couple other arguments related to determinism, called Hard Determinism and Soft Determinism. Hard determinism goes over freedom and necessity on a universal scale. It said something along the lines of: everything in the world is determined by natural laws (physics, chemistry, etc.) and that the world would someday come to realize that free will did not exist because the world is entirely determined by natural laws. Later, people began to believe that the world on a quantum level was indeterministic, but they agreed that the macroscopic world was deterministic. So, Newtonian physics can explain the behavior of objects that we can see, but not the behavior of quarks (a subatomic particle). The macroscopic world was, instead, "near-determined" or "deterministic for all practical purposes". In other words: "Maybe the quark's behavior isn't determined, but your behavior is." However, most people today disagree with hard determinism because:
a. there is little evidence saying that everything (including subatomic particles) is determined.
b. "near-determined" or "deterministic for all practical purposes" is not convincing.
Soft determinism goes over freedom and necessity on the level of our ordinary perceptions of the ordinary world. Some questions include: "Was John free not to steal a loaf of bread?" or "Am I free to pick a number at random after I have heard another number?"
There is also something called indeterminism, which states that at least one thing in the world is a random occurrence. It says that determinism is false because random things happen.
Close to indeterminism is libertarianism (again, nothing to do with politics), which states that at least one thing in the universe is a result of free will. It is similar to indeterminism, except libertarianism says that determinism is false because free will exists (instead of random events).
There are also some theories called materialist theories. This suggests that mental acts are related to actions in the brain (neurological workings and such). So does free will correspond to some activity in the brain? If so, what does it correspond to?
There is also existentialism, which holds that we individually create humanity (or human nature) at every moment through our free acts. We are defined by the way we confront freedom.
Some smaller arguments are bad faith and perverse freedom (related to existentialism).
Bad faith simply says that we attempt to flee from our freedom. In other words, we don't want to be responsible for our own actions. Good faith is simply the opposite of this.
Perverse freedom says that "one is not truly free so long as one is constrained to make choices that are for one's own good." In other words, you are not free so long as you have to obey your stomach's demand for food.[/SPOILER]
Keep in mind that this is philosophy and that there is no right or wrong answer. Please respect that people believe in different things and do not be rude if you disagree with them. I'll say again that this is not freedom in the political sense of the word (or religious for that matter).