Edwin Hubble Edwin Hubble Edwin Powell Hubble (November 20, 1889 – September 28, 1953) was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology and is regarded as one of the most important astronomers of all time. Hubble discovered that many objects previously thought to be clouds of dust and gas and classified as "nebulae" were actually galaxies beyond the Milky Way. He used the strong direct relationship between a classical Cepheid variable's luminosity and pulsation period (discovered in 1908 by Henrietta Swan Leavitt) for scaling galactic and extragalactic distances. Hubble provided evidence
Beyond Civilization the revolution. Daniel Quinn coined the term "new tribalism", which appears in "", "My Ishmael", and, finally, in the most detail, in "Beyond Civilization". He often discusses the proliferation of this new tribalism in terms of a New Tribal Revolution, analogous to the Industrial Revolution in that it refers to a gradual, sociocultural period of change and creative outpouring as opposed to a single, violent, political uprising. Quinn asserts that new tribalists believe that the tribal model, though not absolutely "perfect", has obviously stood the test of time as the most successful social organization for humans, in alignment with natural