According to Nietzsche, Christianity so totally suppressed the body's vital impulses that humanity lost its creativity. Nietzsche taught what Jung was later essentially to repeat, that the irrational factor must neither be eliminated nor thoroughly tamed by order-seeking reason, but somehow integrated into our lives.
Well, it seems someone is connecting the dots in this thread; reason, too much of it as exemplified in the legal reasoning method, and Nietzsche with the irrational factor to be stressed upon, on the other hand ...
Polygamy is an ancestral impulse. Civilization injures humans by creating social conventions that require them to repress their true savage nature. The shackles of family, society, and (patriarchal) Deity must be broken. Live polygamously. This will release the ancient creative energies of the body and the unconscious and bring humans to a new level.
Now, this is quite a statement and surely in line with the things this despises!