I'd say religion and also many things being taken more philosophically or emotionally in this area (a lost sight of the practical substance given by many from the past), a new era of science that became more advanced but also for a long time limited the idea of consciousness to the fellow man regardless of the evidence given in their own theories. Our knowledge is different now and also many texts were translated improperly, or ancient books burned throughout history, people hunted down etc. The phenomena is still there but people took on a new lifestyle and the energy and consciousness took on a pattern accordingly