Nature worship or nature mysticism is often conflated and confused with pantheism. It is pointed out by at least one expert, Harold Wood, founder of the Universal Pantheist Society, that in pantheist philosophy Spinoza's identification of God with nature is very different from a recent idea of a self identifying pantheist with environmental ethical concerns. His use of the word nature to describe his worldview may be vastly different from the "nature" of modern sciences. He and other nature mystics who also identify as pantheists use "nature" to refer to the limited natural environment (as opposed to man-made built environment). This use of "nature" is different from the broader use from Spinoza and other pantheists describing natural laws and the overall phenomena of the physical world. Nature mysticism may be compatible with pantheism but it may also be compatible with theism and other views.