Use "theorizer" in a sentence

1. Perhaps that was a more cheerful time for observers and theorizers than the present; we are apt to think it the finest era of the world when America was beginning to be discovered, when a bold sailor, even if he were wrecked, might alight on a new kingdom; and about 1829 the dark territories of Pathology were a fine America for a spirited young adventurer

2. In this is the fundamental difference between the Christian doctrine and the doctrine of the Positivists, and all the theorizers about universal brotherhood on non-christian principles