I will be more theoretical in my understanding why we "obey" government than was previously done. We "obey" because we've agreed in a sense to do so. I agree that I shouldn't murder because I don't want the return of that. I agree that I won't steal other's property (ownership would be assumed in this case) and so the same won't be done to me. I obey the laws because I hope that others do the same. If, and their are, laws I wish not to live under--then I won't. And this has been true in the past: I cite most of the amendments of the United States Constitution (sorry if I assume your from such said nation). From the right to bare arms (take your interpretation as you will) to civil rights we have changed laws we didn't agree with. But we have to care about it, and a good amount of us must declare so, apathy gets us no where: and so a law might keep on going. The best way to not obey a law you don't agree with is to find others who don't agree with you and find ways to change it. If you don't agree with Gay Marrage, bring it up to the supreme court (agian, sorry if i'm assuming you are from the United States).