Prehispanic Dugout Canoes in Mexico: A Typology Based on a Multidisciplinary Approach

Navigation implies a deep knowledge of the environment in which it is practised as well as the development of correlated technologies and techniques. In fact, sailing in lakes, rivers, along coasts or in high seas requires specific skills. This is why watercraft reflect the specific expertise of cultures in relation to the available resources and materials. Navigation as a means of movement and boats as modes of transportation is a well-documented topic in Europe, Asia and the Pacific Ocean, whether focusing on antiquity or the present. Nonetheless, in the New World, especially in Mesoamerica where the Aztec, Tarascan and Mayan Empires flourished, indigenous maritime history has been thoroughly under-investigated. This article explores the first prehispanic dugout canoes of the region, based on a multidisciplinary approach for the Mexico and Pátzcuaro Basins, in the Late Postclassic period (AD 1325-1521). For the first time, a typology of these dugout types is proposed, with a discussion of the importance of dugout canoes as a means of transportation in Mesoamerican civilizations, where wheels and draught animals did not exist.     

Is “Threat” in the Eye of the Researcher? Theory and Measurement in the Study of State‐Level Immigration Policymaking

This study initiates a methodological critique of the state‐level immigration policy literature through the lens of the racial threat and group power perspectives. First, I highlight the conceptual problems related to the application of such theories to legislature‐level data analysis. Next, I demonstrate the methodological and analytical problems that raise concerns about ad hoc theorizing in this field. Using counts of hostile and welcoming immigration legislation (2005–2011), I demonstrate that outgroup size measures correlate positively with both dependent variables while measures of population growth rate yield null results unless used on their own. These results suggest that the use of legislature‐level models with demographic indicators does not allow us to gain a clear understanding of whether and how population dynamics influence immigration policymaking. Based on these findings, I recommend that when using demographic indicators as key explanatory variables, researchers provide evidence of result consistency across multiple model specifications and also test the models with both hostile and inclusive policy variables. Such protocols would help avoid ad hoc theorizing.     

Models of masculinity: sex education,the United States Public Health Service,and the YMCA, 1919-1924

In 1918, the U.S. Public Health Service (PHS) told American parents that "it is no longer possible for you to choose whether your child will learn about sex or not." According to the PHS, most American boys learned about sex from "improper sources" by the age of nine. The "unfortunate effect of these early impressions" had, PHS warned, not only resulted in a gross misunderstanding of sex, but also been a major factor in the spread of venereal disease (The Parents' Part [the U.S. Public Health Service, 1918], p. 5). To counter and correct this miseducation, PHS joined with the Young Men's Christian Association (YMCA) to create a sex education program aimed at adolescent boys. Officially launched in the spring of 1919, the "Keeping Fit" campaign provides a unique insight into the federal government's attempt to medicalize and regulate American sexuality through the forum of public health.     

The existence of open areas during the Mesolithic: evidence from aeolian sediments in the Elbe–Jeetzel area,northern Germany

Traditionally Mesolithic hunter–gatherer cultures are supposed to have lived in a primeval forest environment with a closed vegetation cover during the Early and Mid-Holocene. It is not until the onset of subsequent Neolithic agricultural societies that the development of more expansive open areas is assumed. Therefore our perception of the Mesolithic economy in the European lowlands is highly affected by the idaea of adaptation to dense forest environments and a very stable system of resource exploitation. However, recent palaeoenvironmental studies provide evidence that areas of open landscapes must have existed at least temporarily during the Mesolithic and evoke the question whether human impact may be accountable for this.