Final answer:
Forging and industrial societies often practice monogamy, a union of two adults which can be highly mobile and is adapted to postindustrial cultures. In contrast, polygamy is more common in agrarian societies where children contribute to food production. Mixed marriages become more prevalent in urban settings due to cultural diversity and global influences.
Step-by-step explanation:
Forging and industrial societies have distinct marriage types that are influenced by their social, economic, and cultural practices. Monogamy is typically well adapted to postindustrial societies, where family units are smaller and highly mobile. This is contrasted by polygamy, which is more prevalent in certain agrarian and traditional societies where the labor of children contributes significantly to food production and economic sustenance.
In societies where monogamy is practiced, the marriage often revolves around the union of two adults, which may include same-sex couples following legalizations in various Western countries. Conversely, polygamous societies, particularly those with a subsistence-based economy, may practice polygyny (one man with multiple wives) to leverage the benefit of having more children for agricultural work and family support.
Additionally, in some urbanized and cosmopolitan areas, mixed marriages among different ethnic backgrounds are becoming more common due to diverse backgrounds coming together and the influence of global media and communication technologies that foster tolerance and acceptance of varying traditions.