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Subsequently , the increasingly reactionary nature of the restored papal government led him to transfer his allegiance to the House of Savoy , where he became a strong supporter of Cavour 's policies . In 1994 , the UN Human Development Report introduced the concept of human security , predicating it on the dual notion of , on the one hand , safety from chronic threats of hunger , disease and repression and , on the other hand , protection from sudden and hurtful disruptions in daily life . In " Balin and Balan , " the story of two brothers locked in fratricidal strife , Tennyson was expanding on very brief source material from Malory , and many critics see this dark central addition to the sequence as psychologically the most personal of Tennyson 's Idylls . The poem illustrated here was read at the first meeting of the Metaphysical Society , a group of leading Victorian thinkers , scientists , religious leaders , and philosophers who met monthly for a number of years to discuss the changing nature of religious belief . Overharvesting of certain species , particularly medicinal plants is also the primary cause of biodiversity loss in Northern Africa . Burns knew how important a work the two of them had produced , and less than a month before his death he wrote to Johnson , " Your Work is a great one .