Academic libraries, apart from their main function, which is to provide information services to academic communities, may also perform a number of social roles in the broad meaning of the term. Accordingly, they now tend to serve as the third place offering inclusion and animation activities to academic as well as local communities (including potential students) and to groups in risk of social exclusion (immigrants, persons with disabilities, senior citizens, etc.) or in need of various kinds of care and support. However, for libraries to be able to fulfil those tasks, they need properly trained staff who not only have the required competencies but also the right social attitudes. The paper presents an analysis of the social attitudes of academic librarians from twenty countries across the world as compared to the personnel of other types of libraries. The level of individual social capital, activity in social networks, aspirations in life and social and civic engagement were investigated. It was noted that the respondents tend to undervalue the importance of the work done by libraries for local communities. At the same time, the research showed that academic librarians have a somewhat lower level of individual social capital and trust than public librarians and less extensive social networks. Nonetheless, they are open to relationships with others, which enables them to engage in various social projects.