The Monsanto International Tribunal, a creation of civil society, sat at The Hague in October 2016. In its “Advisory Opinion” of 18 April 2017, this popular tribunal assessed Monsanto’s conduct under international law with regard to the right to a healthy environment, the right to food, the right to health, scientific freedom, as well as war crimes and ecocide. This article analyzes that opinion and situates it in its international legal context. Given that Monsanto did not participate in the proceedings, the question of a fair trial — which can have a decisive impact on the content of the opinion — is the first issue examined. In regard to the opinion itself, the findings are measured: the Tribunal concluded that Monsanto clearly violated human rights, but not international criminal law under existing legal standards. Given that, the Tribunal suggested two measures to redress the imbalance of the international legal order: on the one hand, to establish a hierarchy in favour of human rights and, on the other hand, to make companies direct bearers of international obligations deriving from these rights.