A Good Point About the Ancient World

N. T. Wright says this in his book Jesus and the Victory of God (p. 186, footnote 160):

It is naive to suppose that first-century Galilean villagers were ready to believe in "miracles" because they did not understand the laws of nature, or did not realize that the space-time universe was a closed continuum.... As has often been pointed out, in Mt. 1.18f. Joseph was worried about Mary's unexpected pregnancy not because he did not know where babies came from but because he did.