The Christian quest for the common good is not reducible either to the simple aggregate of individual goods or to the promotion of the needs of the collective at the expense of the one.
The one and the many is perhaps the oldest problem of human experience. In social thought, this problem manifests itself in the tension between collectivism and individualism.
Collectivists and individualists can be distinguished by the value they each put on individual goods relative to the common good. To put it simply: collectivists prioritize a flawed conception of the common good at the expense of individual goods, while individualists emphasize the importance of individual goods over and against the common good, sometimes even to the extent of denying the common good as a coherent concept.