Social impact assessment (SIA) is a methodology to review the social effects of infrastructure projects and other development interventions. Although SIA is usually applied to planned interventions, the same techniques can be used to evaluate the social impact of unplanned events, for example, disasters, demographic change, and epidemics. SIA is important in applied anthropology, as its main goal is to be able to deliver positive social outcomes and eliminate any possible negative or long term effects. Overview The origins of SIA largely derives from the environmental impact assessment (EIA) model, which first emerged in the 1970s in the U.S. In the United States under the National Environmental Policy Act. Social impact assessments are federally mandated and performed in conjunction with environmental impact assessments. SIA has been incorporated into the formal planning and approval processes in several countries, in order to categorize and assess how major developments may affect populations, groups, and settlements. Though the social impact assessment has long been considered subordinate to the environmental impact assessment, new models, such as the Environmental Social Impact Assessment (ESIA), take a more integrated approach where equal weight is given to both the social and environmental impact assessments. Although the Social Impact Assessment is recognized and used as a methodology, to review its social effects on industry projects. The term SIA is more widely known in most European countries, whereas in North America, the term Cultural impact is more widely used. Cultural and social terms were first seen to describe a branch of anthropology. There are no significant differences between the two however, both terms overlap each other to a certain extent. ‘Cultural Anthropology’ as mentioned is more commonly used in the US, its term is well known to the early works of American anthropologists. Some of the most prominent figures include Franz Boas and Ruth Benedict, they have both have stressed that unity in cultures through their language, behavior, ideologies, and material creations. On the other hand, ‘Social Anthropology’ is a term developed over the 20th century primarily in Britain. Their emphasis on what social anthropology is, is based on social relationships. Although it is based more on a theoretical approach just like cultural anthropology; its emphasis is understanding the social impacts and relations in a particular society. Social Impact Assessment Social impact assessments are used to identify and manage the social impacts of industrial projects. These SIA can also be linked