I don&#x27;t know which period the parent may be referring to, but if you believe in Mr. Monroe&#x27;s methodology[0], you can definitely see the reduction in moderates on both sides starting at a peak around 1930.<p>[0]: <a href="https:&#x2F;&#x2F;xkcd.com&#x2F;1127&#x2F;large&#x2F;" rel="nofollow">https:&#x2F;&#x2F;xkcd.com&#x2F;1127&#x2F;large&#x2F;</a>