Social science is organized around arguments. This is what we hope to prove, or disprove, by an empirical analysis. Science proceeds as arguments are advanced, revised, and proven or disproven.
A theory is the reasoning behind an argument. It explains a relationship, its mechanisms (if the relationship is causal), scope-conditions, background conditions, and any additional information needed to interpret the argument. One might theorize that democratization enhances economic growth because it holds leaders accountable, and accountable leaders are more likely to adopt policies that serve the public good.
If a theory is presented in a formal manner, perhaps with a set of mathematical expressions, it may be referred to as a model. At present, however, we do not distinguish between an argument, theory, or model; these terms will be used more or less synonymously.
A hypothesis is the specific, testable element(s) of any argument. One might hypothesize that as a country becomes more democratic its GDP (gross domestic product) growth increases. Our use of the term “argument” is thus meant to encompass both theory and hypothesis.
This chapter begins by distinguishing various types of social science argumentation. Arguments central to social science are generally classifiable as either descriptive or causal, so we spend considerable time on these genres. Next, we contrast these genres with other sorts of arguments such as those that are predictive, normative, or prescriptive. Finally, we lay out the characteristics of a good descriptive or causal argument. (Additional criteria specific to causal arguments are postponed until Part II of the book.)
Descriptive Arguments
A descriptive argument describes some aspect of the world. In doing so, it aims to answer what questions (e.g., when, whom, out of what, in what manner) about a phenomenon. Descriptive arguments are about what is or what was.
Note that many features of the world are intrinsically important. We want to know which countries are democratic and which are not, and in what ways they are democratic or undemocratic. We want to know how many Jews, gypsies, gays, and socialists were killed in the European Holocaust. We want to know the intellectual origins of individualism, and how it evolved through time and across cultures. We want to know whether the media in a country presents a biased view of news events, and in what direction that bias runs.