books.google.com.br - Arendt's penetrating observations of the modern world, based on a profound knowledge of the past, constitute a major contribution to political philosophy. In this book she describes the perplexing crises which modern society faces as a result of the loss of meaning of the traditional key words of politics:...http://books.google.com.br/books/about/Between_past_and_future.html?hl=pt-BR&id=NGB8R8r30wQC&q=authority&utm_source=gb-gplus-shareBetween past and future