Why did some astrologers associate the Age of Aquarius with brotherhood and enlightenment?

Astrologers and proponents of the New Age movement associate the Age of Aquarius with brotherhood and enlightenment because they view this transition as a period defined by significant social change, characterized by increasing harmony and connection among people.12

This expectation is rooted in the belief that the movement of the Earth into this new astrological cycle signals the release of new waves of spiritual energy. For many practitioners of astrology and Spiritualism, the arrival of the Aquarian Age serves as a promise of a transformative era where humanity moves toward a higher state of consciousness and collective unity.34

While there is no consensus on the exact start date of this age, the concept remains a fundamental pillar of New Age thought, representing a shift toward a more enlightened global society.12