Sociological Institutionalism argues that institutions shape actor preferences and available choices rather than actors rationally designing institutions. It focuses on how shared understandings, norms, and routines develop through fields and isomorphic processes like mimicry. While providing explanations for stability, it has faced criticism around allowing for innovation and change given its emphasis on taken-for-granted practices and copying between actors. The theory is argued to be most applicable in situations where symbolic dimensions dominate, technical dimensions are immature, or long time frames are considered.