We study the relationship among biophysical variables, focusing on land cover and, socioeconomic, demographic and violence variables. The method to do so is Identifying significant correlations that show multiple interactions between ecosystems and society. Using these correlations several related hypotheses are tested. What is seen is that life conditions seem more favored in intermediate conditions of transformation of ecosystems; this is less due to poverty than to better economic conditions. Violence relates itself more whit the first than with the latter although evidence shows that little transformed places are violent. What is proposed here is that as the ecosystems are transformed the resources get scarce and people get poorer; with this the pressure over these few resources, the environmental damage and the migrations increases, sometimes stimulated by violence too. In sum, here we show the importance of incorporation, in a deeper way, of the ecological and environmental variables to the study and following of the general conditions of the nation.