Power Matters: The Structural Sources of Brazilian Foreign PolicyI beg your pardon: Octavio wrote a book on what?! For those familiar with previous publications and career path of Amorim Neto - and there are many in Brazil as well as abroad - nothing could be more surprising than him writing a book on policy. Domestic institutions such as presidents, cabinets and parliaments had always been at core of his research, and articles in World Politics, Comparative Political Studies, American Journal of Political Science, and Party Politics have earned him a reputation as a quantitative-oriented, comparative politics scholar. How - and why - could he possibly have transited from a solid terrain that he fully mastered to uncharted territories of another social science he had previously published? I think two reasons should be called forth to explain this gamble. First, it is not so infrequent for people to come back to their first love, and diplomatic history was among Amorim Neto's earliest and dearest interests - and remained a strong reason for his fondness for politics. Second, and partly as a consequence of above, he bought into idea that comparative politics and international relations were separate disciplines. Rather, as he once wrote that comparative politics was the politics of others (2010), he would most likely subscribe to Javier Solana's dictum that foreign policy is all about domestic policy of others, and thus that international relations is arena of interaction between both comparable and entangled units. In his understanding, all these fields of knowledge fall fully within sphere of power relations, which is to say that they belong to what political science - and political scientists - study. For such an open mindset, state borders are not stiffenough as to keep knowledge in watertight compartments or, to paraphrase Almond (1988), separate tables. So Amorim Neto decided to invest his methodological skills and comparatist training into a new, though related, venture: to find out determinants of contemporary policy of his home country.This book introduces three main innovations to preexisting analyses. They regard methods, time frame and theory. As to methods, this volume is first systematic attempt to test with empirical data whether it is domestic politics or international system that have influenced more decisively Brazilian policy. Thus far, discussions had mostly been held between arguments on continuity (accentuating professionalism of Itamaraty and above-politics strategies) versus change (focusing on leadership and epitomized in famous Lula's sentence, never before in history of this country). However, both strands of arguments were defended in an impressionistic rather than fact-based fashion and also, more often than not, ideologically biased and normatively oriented. To overcome these pitfalls, Amorim Neto made careful though risky decision to use a quantitative indicator to measure orientation of Brazilian policy, and so he resorted to a database that included every non unanimous vote in General Assembly of United Nations (Voeten e Merdzanovic 2008) to build dependent variable, i.e., policy alignment with United States. It measured degree of convergence in voting behavior between two countries over time and across issues, and showed that it decreased abruptly from over 80% in 1940s to around 10% in 2000s.As book shows, to consider policy alignment with United States as a proxy for Brazilian policy at large follows a methodological choice that is shared by virtually all scholars regardless of paradigmatic leaning. Yet, it also brings us to second innovation: time span. Unlike most of literature, Amorim Neto does not start his narrative either with Barao de Rio Branco or with preceding empire. This decision is made on methodological grounds, as there was no UN - and therefore no voting record - prior to 1945. …