The following papers offer insight into the role of social cognition in the evolution of mind.
Cole, J. (2014). Hominin language development: A new method. Biosemiotics. DOI 10.1007/s12304-014-9198-8.
Putt, S. S., Woods, A. D., & Franciscus, R. G. (2014). The role of verbal interaction during experimental bifacial stone tool manufacture. Lithic Technology, 32, 96-112.
Stout, D. (2002). Skill and cognition in stone tool production: An ethnographic case study from Irian Jaya. Current Anthropology, 43, 693-722.