The World Pantheist Movement (WPM) is an organization of people associated with pantheism, a philosophy that asserts that spirituality is centered around nature. It claims membership in many countries. Some critics claim that they should be associated with Pan-atheism instead.
Both of the above organizations are controversial among people who have strong feelings about the term 'pantheism', reflecting the fact that there are differences within pantheism itself, which is a term necessarily broad in scope. The WPM approach can be specifically referred to as naturalistic pantheism, which many consider to be distinctly different from classical pantheism. An example of why these religious organizations have been called atheist and/or Pan-atheist can be seen in an Atheist Magazine interview with Paul Harrison [1].
There is also no relationship whatsoever with cosmotheism, a term sometimes used to refer to a white separatist religion founded by William Pierce, and sometimes used variously otherwise.