There, are however, some basic concepts which are common to most Druids.
Most groups are open to both men and women on an equal basis.
Some are Goddess based, some distinctly Pagan, others distinctly not. Some do not regard Druidry as a religion at all, but as a philosophy or science. Most, however, seek to preserve the ecological balance of the Earth and see humankind as an integral part of nature rather than above or in control of nature. The origins of Druidry are lost in the remote past, though much of modern Druidry draws its inspiration from Celtic traditions. Early evidence of Druidry can be gleaned from the works of writers such as Pliny the Elder and Julius Caesar.