The Navarre commentary says Paul is addressing Christians of Gentile origin (“you”), in contrast to when he uses “we” to mean Christians of Jewish origin. And that he is referring to the fact that:
prior to their conversion to Christ a pagan was, as it were, en route to death, that is liable to condemnation on account of sin – both original sin and sin caused by worldly behavior, that is, actions opposed to God. That is what the Apostle means here by “this world” – a world which is under the power of the devil
The Navarre us the RSV as its text so Ephesians 2:1-2 reads:
And you he made alive, when you were dead through the trespasses and sins in which you once walked, following the courses of this world, following the princes of the power of the air, the spirit that is now at work in the sons of disobedience.