quality:corruption
Religious views

In Monism as Connecting Religion and Science (1892), he argued in favor of monism as the view most compatible with the current scientific understanding of the natural world. His perspective of monism was pantheistic and impersonal.

The monistic idea of God, which alone is compatible with our present knowledge of nature, recognizes the divine spirit in all things. It can never recognise in God a "personal being," or, in other words, an individual of limited extension in space, or even of human form. God is everywhere.

Haeckel became the most famous proponent of Monism in Germany. In 1906 Haeckel belonged to the founders of the Monist League (Deutscher Monistenbund), which took a stance against philosophical materialism and promote a "natural Weltanschauung". This organization lasted until 1933 and included such notable members as Wilhelm Ostwald, Georg von Arco (1869–1940), Helene Stöcker and Walter Arthur Berendsohn.