Complex sentence: Transcendentalism was a philosophical movement that developed in the late 1820s and' 30s in the Eastern region of the United States as a protest against the general state of intellectualism and spirituality.
Split into simpler sentences: Transcendentalism was a philosophical movement that developed in the late 1820s and 1830s in the eastern region of the United States. The movement was a reaction to, or protest against the general state of intellectualism and spirituality.