Among the many environmental influences on personality, what is the most influential?

Parenting is foremost among environmental factors that influences personality development, and a great deal of research has examined different parenting styles. Research indicates that certain parenting styles, general patterns of interacting and disciplining children, promote more healthy development that others (Baumrind, 20015; Baumrind, Larzelete, & Owens, 2010; Gunnoe, 2013).