Interpret the impact of Iberian (Spanish and Portuguese) colonialism

How should we interpret the impact of Iberian (Spanish and Portuguese) colonialism in Latin America? Was Iberian colonialism essentially "degradation and social conflict" as Stanley and Barbara Stein contend, relatively 'benign' as Philip Powell argues, ineffective at controlling their colonies, or more complex than these description?
Answer this topic covering the uploaded material and arguments proven in them like mining, Native Labor, slavery as well as the caste system and rebellions incorporate at least 4 different sources (page numbers in the uploaded file are missed in between shows starting of another source). Use multiple quote from each source (at-least 3 each).

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