In Vietnam era, canon under critique for colonialism, imperialism, anths working for Establishment. Mediating knowledge in use. Look at how knowledge is mediated in applied anth in use. Need more mature theory, not premature practice. All anth has potential application.
Social engineering is older vision.
Praxis is implicit. But can lead to narrowly constructed types of data, using recognized techniques like survey, counting, quantitative, systematic data gathering and archiving. Old anth problem defined by contractor or researcher. Action anthropologist comes with skills, lets community define problem. Creates different relations with subjects .