The Fijians: A Study in the Decline of Customs is a study by author Basil Thomson that examines and analyzes ethnographic aspects of the life and customs of the Fijian people. The book tells about the traditions, religious rites, social structure and daily life of Fijians, as well as how these customs have undergone changes and destruction under the influence of colonialism and modernization. Basil Thomson details the processes of degradation and gradual disappearance of traditional customs under the pressure of external influences. The author examines the impact of Christian missionary activity, new laws and policies on traditional Fijian culture. This book makes an important contribution to the study of Fijian society and culture, and contributes to our understanding of the processes of transformation and preservation of cultural heritage in the face of globalization and modernization.