Nature S Third Cycle
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Nature's Third Cycle
The cycle of day and night and the cycle of seasons are two familiar natural cycles around which many human activities are organized. But is there a third natural cycle of importance for us humans? On 13 March 1989, six million people in Canada went without electricity for many hours: a large explosion on the sun was discovered as the cause of this blackout. Such explosions occur above sunspots, dark features on the surface of the Sun that have been observed through telescopes since the time of Galileo. The number of sunspots has been found to wax and wane over a period of 11 years. Although this cycle was discovered less than two centuries ago, it is becoming increasingly important for us as human society becomes more dependent on technology. For nearly a century after its discovery, the cause of the sunspot cycle remained completely shrouded in mystery. The 1908 discovery of strong magnetic fields in sunspots made it clear that the 11-year cycle is the magnetic cycle of the sun. It is only during the last few decades that major developments in plasma physics have at last given us the clue to the origins of the cycle and how the large explosions affecting the earth arise. Nature's Third Cycle discusses the fascinating science behind the sunspot cycle, and gives an insider's perspective of this cutting-edge scientific research from one of the leaders of the field.
The Soteriology of Leo the Great
Leo the Great was the beneficiary of the consolidation of the power of the papacy in Rome and the Christianization of the city over the course of the preceding century. In this carefully nuanced study Bernard Green demonstrates the influences at work on this celebrated pope's development as a theological thinker, including two of the most reknowned theological names of the period, Ambrose of Milan and Augustine of Hippo. Green charts Leo's theological journey from his first encounters with the Pelagian and Nestorian controversies, where he engaged Cassian as an advisor. Leo took an admiring though limited view of Cyril of Alexandria but misunderstood the weaknesses in Nestorius' thought. As pope, Leo preached a civic Christianity, accessible to all citizens, baptising the virtues of the classical and civic past. The study then examines Leo's recently dated sermons and reveals the evolution of his thought as he worked out a soteriology that gave full value to both the divinity and humanity of Christ, especially in reaction to Manichaeism. In the crisis that led to Chalcedon, Leo's earlier misunderstanding of Nestorius affected the content of his Tome, which was atypical of the Christology and soteriology he had developed in his earlier preaching. Green persuasively concludes that its emphasis on the distinction of the two natures was an uncharacteristic attempt to respond to both Eutyches and Nestorius, as this pope understood them. In the light of Chalcedon, Leo produced a revised statement of Christology, the Letter to the Palestinian monks, which is both more accomplished and better aligned with his characteristic thought.
Buddhist Moral Philosophy
The first book of its kind, Buddhist Moral Philosophy: An Introduction introduces the reader to contemporary philosophical interpretations and analyses of Buddhist ethics. It begins with a survey of traditional Buddhist ethical thought and practice, mainly in the Pali Canon and early Mahāyāna schools, and an account of the emergence of Buddhist moral philosophy as a distinct discipline in the modern world. It then examines recent debates about karma, rebirth and nirvana, well-being, normative ethics, moral objectivity, moral psychology, and the issue of freedom, responsibility and determinism. The book also introduces the reader to philosophical discussions of topics in socially engaged Buddhism such as human rights, war and peace, and environmental ethics.