Altruism owes its existence to the obscure recognition that we are parts of a united organism, humanity.
In the second half of his book Nicolai undertakes to throw light upon this obscure realisation, and to establish it upon a scientific foundation. He undertakes to show that humanity is no mere abstraction, but a living reality, an organism that can be subjected to scientific observation.
In this study, the poetical intuition of the ancient philosophers is interestingly linked with the experimental spirit and the analytical method of modern science. The latest biological and embryological theories are invoked to help in the comment on the hylozoism of the seven sages and the mysticism of the early Christians. Janicki and de Vries shake hands with Heraclitus and Saint Paul. The upshot is a strange vision of materialistic and dynamistic pantheism—a vision of humanity considered as a body and a soul in unceasing motion.
Nicolai begins by reminding us that this idea has existed in all ages. He summarises the history of the doctrine. We have the “fire" of Heraclitus, which for the sage of Ephesus was also the universal intelligence of the world. We have the same thing in the “pneuma” of the stoics and in the “pneuma agion” of the primitive Christians, the sacred energy, the vivifying force, which is the concentrated essence of all the souls. It is what Origen speaks of as “universum mundum velut animal quoddam immensum.” We encounter the idea once more in the fertile fancies of Cardanus, Giordano Bruno, Paracelsus, and Campanella. Animistic ideas are mingled with the science of Newton, and permeate his hypothesis of universal gravitation. Indeed, Musschenbroek, his immediate disciple, describes the gravitative principle as “amicitia”; while Lichtenberg, tells us that it is the “longing of the heavenly bodies for one another!” In a word, through the whole development of human thought runs the belief that our world is a single organism with a consciousness of its own. Nicolai tells us how it would interest him to write the history of this idea; and he outlines that history in his fascinating
