Climate, Fire and Human Evolution

The book outlines principal milestones in the evolution of the atmosphere, oceans and biosphere during the last 4 million years in relation with the evolution from primates to the genus Homo which uniquely mastered the ignition and transfer of fire. The advent of land plants since about 420 million years ago ensued in flammable carbon-rich biosphere interfaced with an oxygen-rich atmosphere. Born on a flammable Earth surface, under increasingly unstable climates descending from the warmer Pliocene into the deepest ice ages of the Pleistocene, human survival depended on bothbiological adaptations and cultural evolution, mastering fire as a necessity. This allowed the genus to increase entropy in nature by orders of magnitude. Gathered around camp fires during long nights for hundreds of thousandth of years, captivated by the flickering life-like dance of the flames, humans developed imagination, insights, cravings, fears, premonitions of death and thereby aspiration for immortality, omniscience, omnipotence and the concept of god. Inherent in pantheism was the reverence of the Earth, its rocks and its living creatures, contrasted by the subsequent rise of monotheistic sky-god creeds which regard Earth as but a corridor to heaven. Once the climate stabilized in the early Holocene, since about ~7000 years-ago production of excess food by Neolithic civilization along the Great River Valleys has allowed human imagination and dreams to express themselves through the construction of monuments to immortality. Further to burning large part of the forests, the discovery of combustion and exhumation of carbon from the Earth's hundreds of millions of years-old fossil biospheres set the stage for an anthropogenic oxidation event, affecting an abrupt shift in state of the atmosphere-ocean-cryosphere system. The consequent ongoing extinction equals the past five great mass extinctions of speciesconstituting a geological event horizon in the history of planetEarth.

Explains pre-historic human evolution Gives insight into the origins of the mastery of fire Broadens our understanding of climate change Explores future climate trends Debates the philosophy of science Includes supplementary material: sn.pub/extras

Auteur

Dr Andrew Glikson is an Earth and Paleo-climate Scientist, Visiting Fellow at the Australian National University, Research School of Earth Science, the School of Archaeology and Anthropology, and the Planetary Science Institute, and a member of the ANU Climate Change Institute.

Contenu

Preface.-Acknowledgements.-Introduction.-Part I. Atmosphere-Ocean-Biosphere-Cryosphere Systems and carbon-oxygen cycles .- 1. Atmosphere dynamics.-2. Atmosphere chemistry.-3. Early Atmosphere-ocean-ice systems.-4. Biological Evolution through the Cainozoic ice ages.-5. From primates to humans.-6. From genetic evolution to cultural-evolution.-Part II. Fire The nature of fire. - 7. The history of fire.-8. Fire and human evolution
Part III. The Anthropocene : The Anthropocene; Homo sapiens' war against nature.-Part IV. Epilogue: Future Blueprints.-Appendices .- 1. Climate change charts.-2. Biologic evolution tree for the Cainozoic.-3. Human evolutionary tree.-Index.