“…There is no single cause that should be sought; as with all human development, multiple, interrelated, factors, working synergistically, need to be studied. This position is not new [see Pepper, 1942 for his discussion of the "contextualist" paradigm], but recent years have seen rich theoretical grounding and compelling empirical evidence supportive of this complex paradigm [Bronfenbrenner, 2001;Lerner & Overton, 2008;Michel, 2014;Overton, 2015;Sameroff & Mackenzie, 2003;Tudge, 2008;Witherington, 2014], perhaps better termed the relational developmental systems paradigm [Lerner, 2015].…”