The section $,$ Specialization $-$ A Wide Range in Chapter $13$ indicates that : Although anthropolgy used to have a wide $-$ range of areas of specialized study $,$ the number of specializations has been shrinking for a long time and is now quite small $.$ The number of areas of specialized study in anthropology has increased in recent decades $.$ Although the types of specialized study have changed over time in anthropology $,$ their number has remained pretty much the same $.$