Fascinating book. Wright makes a compelling argument for the life-long significance of the dyadic relationship between mother and infant, before going on to spell out the role of the father as the bringer of symbolic discretion and, building on this, the repercussions of maternal and paternal modes of knowing and communicating.
Adopting a gradualist perspective, I would contend that everything he observes concerning the dyadic/triadic dynamics in early infancy being recapitulated in the therapeutic encounter is equally valid when making a consideration of learning, growth, and psychological change more generally in life. This tells us something important about how healthy development might be staged and promoted.