Many evolutionary biologists suggest that humans developed language primarily for economic purposes. Effective trade requires the establishment of trust, and language facilitates this process. It serves as a vital tool for conducting business transactions. For instance, two early humans could effectively negotiate the exchange of three wooden bowls for six bunches of bananas while also setting specific terms. Questions might arise, such as the type of wood used for the bowls or the source of the bananas. Accomplishing such a deal would have been nearly impossible through mere gestures and vague sounds. Furthermore, fulfilling the agreed terms strengthens trust, as language enables precise communication, making conversation essential in these interactions.