Christianity is the summit of civilisation. Three cities and three ideas made the West: 1. Roman law (Rome), 2. Greek philosophy (Athens), and 3. the Christian faith (Jerusalem). The most important of these is the latter (the Christian faith), which perfected the former (Greek philosophy and Roman law).
It should come as no surprise that there is a strong positive correlation between the decline of Christianity in the West and the rise of pre-natal infanticide.