Echoing the phylogenetic path, humans' unique skills at joint and collective intentionality develop during the individual's lifetime by scaffolding, not only on simple skills like distinguishing animate/inanimate matter, but also on the communicative conventions and institutions forming the socio-cultural environment, forming feedback loops that enrich and deepen both cultural ground and individual's prior skills. "asic skills evolve phylogenetically, enabling the creation of cultural products historically, which then provide developing children with the biological and cultural tools they need to develop ontogenetically".