In 2006 Dr. Pablo Marquet organized a meeting on Ecological Complexity and invited the leading scientists behind several theories in ecology (Metabolic Scaling Theory, Neutral Theory, Maximum Entropy Theory of Ecology and Network Theory) at that meeting, held at Valparaíso (Chile), we realized that these theories were connected in non-trivial ways and that integration among them was an important pursue. However, we also realized that before attempting any synthesis and integration we should reflect on the essential characteristics of theories and their role in science and ecology. We met two or three times during the coming years and reflected upon the role of theory in Ecology and produced two pieces that were published in the journal Bioscience (see Marquet et al. 2014, 2015 and Supporting material 1) as well as some initial integration of theories (Odwyer et al 2009, Harte et al 2015). During the last meeting we decided to become a Network For Ecological Theory Integration (NETI) and agreed to meet again each two years in the US (2016) and Prague (2018) to continue the integration of theories.