While all animals communicate, the ability to think and communicate freely using language, as humans do, appears to be unique. What might be the origins of human language? One perspective considers language as an emergent system, a form of cultural evolution, arising from interactions among individuals collectively solving problems in their environment. Another perspective emphasizes the biological evolution of abilities to acquire and use language. For example, while non-human animals do not seem to exchange complex concepts using a variety of combined words, humans acquire this ability effortlessly through typical development. This suggests that humans possess traits that underpin the acquisition of this ability, and that these traits evolved biologically. In this respect, the origins of language are related to evolutionary biology as well as linguistics.