There are also differences in how this new age is envisioned. Those adhering to what Hanegraaff termed the "moderate" perspective believed that it would be marked by an improvement to current society, which affected both New Age concerns—through the convergence of science and mysticism and the global embrace of alternative medicine—to more general concerns, including an end to violence, crime and war, a healthier environment, and international co-operation. Other New Agers adopt a fully utopian vision, believing that the world will be wholly transformed into an "Age of Light", with humans evolving into totally spiritual beings and experiencing unlimited love, bliss, and happiness. Rather than conceiving of the Age of Aquarius as an indefinite period, many believe that it would last for around two thousand years before being replaced by a further age.