The Theosophical Society, founded in New York in 1875 by Helena Petrovna Blavatsky, Henry Steel Olcott, and William Quan Judge, is one of the most influential esoteric organizations of the modern era. Established with the aims of promoting universal brotherhood, fostering comparative study of religion, philosophy, and science, and exploring the hidden laws of nature and latent capacities in humankind, the Society represented a radical departure from the dogmas of its time. Over the past 150 years, it has grown into a global movement with lodges and centers across continents, continuing to engage scholars, seekers, and reformers alike.