Polytheistic reconstructionism (or simply reconstructionism) is an approach to modern paganism first emerging in the late 1960s to early 1970s, which gathered momentum starting in the 1990s. Reconstructionism attempts to re-establish genuine polytheistic religions in the modern world through a rediscovery of the rituals, practices and contextual worldviews of pre-Christian pagan religions. This method stands in contrast with other neopagan syncretic movements like Wicca, and ecstatic/esoteric movements like Germanic mysticism or Theosophy.
While the emphasis on historical accuracy may imply historical reenactment, the difference between these two movements can be summarized as one of intent. Historical reenactment seeks historical accuracy as a goal in and of itself. On the other hand, a reconstructionist neopagan views historical accuracy as a means to the end of establishing a harmonious relationship between a belief-community and the gods.