The underlying message of the Lancet article is that if you want to understand aggressive behaviour in children look to the social and emotional environment in which they are growing up and the values they bring to the viewing experience.
Quality is a direct experience independent of and prior to intellectual abstractions.
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I live with one foot in the sand and one in the snow. There's European egocentricity and the African opposite. I normally say that my African experience has made me a better European.