I am presently in the process of trying to memorize the book of Romans, which would take rather long to do. Anyway, I was looking at Rom. 2:12 when I say something very interesting.
For all who have sinned without the Law will also perish without the Law; and all who have sinned under the Law will be judged by the Law. (Rom. 2:12)
Firstly, we can see here that Paul mentions that people sinned WITHOUT the Law, so therefore the Scriptures affirm here that even without knowledge of the law (or the gospel) for that matter, Man do sin. Sin is sin even when nobody knows it is sin! Sinners like e.g. sodomites can try to whitewash their sins, and even make their sin legal by enacting laws to protect them from so-called 'discrimination', and criminalize the Gospel, but God still calls it sin and they will ultimately be judged based on God's laws, not the laws of Man.
Secondly, those who sin without the Law will also perish without the Law. The main thing that can be seen here is that ALL who sinned apart from the law will also PERISH. This should silence all the universalists and inclusivists everywhere, but of course those heretics do not obey the Scriptures. From the rank liberals to the 'evangelical' liberals like Brain McLaren to the spineless Joel Osteen & Rick Warren, all of them deny this important Gospel truth, the latter when being given the public spotlight.
Thirdly, there is no partiality with God (v. 11). Those who have the law will be judged based on the Law of God which is revealed to them. Those with the Law should have known better, yet they continually violate the Law(Rom. 2:23-24), blaspheming God's name because they claim to follow God. And therefore,
All have sinned and fall short of the glory of God (Rom. 3:23)
which sets the stage for the proclaimation of the Gospel of our Lord Jesus Christ. ...