There is a danger in seeing Christ's work of redemption as solely focused on one's individual sins. But at the same time the lived experience of Christians is precisely an experience of redemption from individual sins that block union with God and neighbor: "How can I ever be friends with Him, or with him, or with her, or with them, after I did that to Him, or to him, or to her, or to them?" In the context of one's individual repentance, a focus on the sin of the world and the deeply rooted social dimensions of sin, may be a distraction or even an excuse. "It's not my sin, but our sin." And it is not far from our sin to nobody's sin. Adam shifted the blame for his sin onto Eve, and Eve onto the serpent. It would have been no better if they shifted it onto the world.
None of this denies that there are structures of sin that are of cosmic importance, and that the means by which the individual sinner is redeemed is through-and-through ecclesial. But we must also not overestimate the importance of cosmic sin. For there is nothing worse in the world than mortal sins, and it is only individuals who commit those, and thereby separate themselves from God and one another. Moreover, to the true lover, the beloved is a cosmos. And God loves each of us.