“In all these issues Reformed theology was able to make such sound judgments because it was deeply imbued with the idea that Adam did not yet enjoy the highest level of blessedness. Sin undoubtedly has cosmic significance. As is evident from the phenomenon of death, sin also impacts our physical existence and has brought the entire earth under the curse. Without sin the development of humanity and the history of the earth would have been very different—though still unimaginable. Still, on the other hand, the state of integrity cannot be equated with the state of glory. We may not draw conclusions from the former for the conditions of the latter. Isaiah 11:6 and 65:25 can no more be applied to the state of human life before the fall than Mark 12:25; Luke 20:36; and 1 Corinthians 6:13 (etc.). Though the form (forma) has changed, the matter (materia) of humankind, plant, animal, nature, and earth is the same before and after the fall. All the essential components existing today were present also before the fall. The distinctions and dissimilarities between men and women, parents and children, brothers and sisters, relatives and friends; the numerous institutions and relations in the life of society such as marriage, family, child rearing, and so forth; the alternation of day and night, workdays and the day of rest, labor and leisure, months and years; man’s dominion over the earth through science and art, and so forth—while all these things have undoubtedly been modified by sin and changed in appearance, they nevertheless have their active principle and foundation in creation, in the ordinances of God, and not in sin. Socialism and communism, also the socialism and communism of many Christian sects, are right in combating the appalling consequences of sin, especially also in the sphere of society. But these systems do not stop there; they also come into conflict with the nature of things, the creation ordinances, and therefore consistently take on, not a reformational, but a revolutionary character.”
From Reformed Dogmatics, Vol 2. ch. 13 on Human Destiny