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The HANDY Model (Human and Nature Dynamics Model), developed in 2014 by a group of researchers from the University of Minnesota and Maryland and published in the journal Ecological Economics, brought a new approach to the long-lived Predator-Prey Model. A lapse of just over two centuries separates the first model, proposed by Thomas Robert Malthus of the HANDY Model, and although there have been other similar models within this time frame, it has modeled population evolution more systematically: it divided the population between Rich ("Elites") and Poor ("Common") and added two other greatness, Wealth and Nature. Observing the great demographic growth, with the consequent increase in Wealth for some, to the detriment of others, it is noticed that the society suffers from public policies that soften the social differences, which, analyzed alone, already cause severe damages to the society. Added to this social difference is Nature, predatory by the exacerbated consumption and that does not have the attention due when the subject is regeneration or exhaustion. This problem was implemented in this work, using the MODELLUS software, which explained the analysis behind the formulas, giving a clear and clear overview, easy to interpret, being possible, even, to find solutions when the imbalance begins, before collapse. The different implementations translated a qualitative analysis of the behavior of the HANDY Model, generating risk scenarios, which can be determinant to the collapse or confidence scenarios, using as variables the population of the "Elites", population of the "Commons" Nature and Wealth.

IMPLEMENTAÇÃO DO MODELO HUMAN AND NATURE DYNAMICAL (HANDY) POR MEIO DA UTILIZAÇÃO DO SOFTWARE MODELLUS: UMA ANÁLISE QUALITATIVA