Tsiolkovsky stated that he developed the theory of rocketry only as a supplement to philosophical research on the subject.

He wrote more than 400 works, most of which are little known to the general reader.

Tsiolkovsky wrote a book called “The Will of the Universe”. The Unknown Intelligence in 1928 in which he propounded a philosophy of panpsychism. He believed humans would eventually colonize the Milky Way galaxy.

This was the very beginning of Tsiolkovsky’s research into space flight problems and was the basis for it. His main work of this subject was “Ethics or the Natural Foundations of Morality” (1902-1918). In 1932 Tsiolkovsky wrote “The Cosmic Philosophy” – the summary of his philosophical ideas. His main idea was to achieve happiness not only for humanity, but also for all the living beings in the Cosmos, for all the Universe. According to Tsiolkovsky’s Cosmic Philosophy, “happiness” is the absence of all kind of suffering in all the Universe, for all times, as well as the absence of all of the processes for destroying goodness. How shall we start this evolution to the “Universal Happiness”? The main task is to study the main laws which rule the Universe. To do so, we must study the Universe, and therefore we must learn how to live in outer space. To begin that long period of our evolution, we will have to design large manned space rockets. So, the first space flight will be the beginning of the new era of space exploration, the beginning of Space Culture in human history. It will be the beginning of our history itself.

Tsiolkovsky was very much as interested in the philosophy of space as he was with the engineering needed to make space flight possible. This was the very beginning of Tsiolkovsky’s research into space flight problems and was the basis for it. His main work of this subject was “Ethics or the Natural Foundations of Morality” (1902-1918). In 1932 Tsiolkovsky wrote “The Cosmic Philosophy” – the summary of his philosophical ideas. His main idea was to achieve happiness not only for humanity, but also for all the living beings in the Cosmos, for all the Universe. He believed that human occupation of space was inevitable and would drive human evolution.

According to Tsiolkovsky’s Cosmic Philosophy, “happiness” is the absence of all kind of suffering in all the Universe, for all times, as well as the absence of all of the processes for destroying goodness. How shall we start this evolution to the “Universal Happiness”? The main task is to study the laws which rule the Universe. To do so, we must study the Universe, and therefore we must learn how to live in outer space. To begin that long period of our evolution, we will have to design large manned space rockets. So, the first space flight will be the beginning of the new era of space exploration, the beginning of Space Culture in human history. It will be the beginning of our history itself. He truly believed that it was the destiny of humankind to occupy the solar system and then to expand into the depth of the cosmos, living off the energy of the stars to create a cosmic civilization that would master nature, abolish natural catastrophes, and achieve happiness for all.