How could a person alone be the image of a Trinitarian God? of a God who is Trinity? No one is Imago Dei alone. My aim in this chapter is to address the relationship between the image of the Trinitarian God and the ethics of collectivity, with the latter being a potential expression of the former. To this end, I will take a closer look at the doctrine of the Imago Dei in its collective dimension, the Imago Trinitatis, investigating the role and mission left by God in the account of human creation as the image of God in society. First, I will argue that, rather than a personal quality held by each person, the Trinity creates humanity as Imago Dei, human beings in their relational dimension. Here, my interlocutors will include St. Irenaeus, St. Gregory Palamas, Milton Schwantes, and Johan Konings, with their perspectives on the Imago Dei. Second, I will address the collective dimension of the image of God, which has an ethical mission as its divine mission. The ethics of collectivity is a way of promoting the kingdom of God in relation to social justice, understanding that it is essential to view the other with empathy and act in alterity. In such a complex world, marked by injustice, disrespect, and countless tragedies, it is possible to overcome ideological and political shortcomings through dialogue and a commitment to solidarity. Humanity, as the image of the Trinitarian God, as the embodied pneumatic body of Christ, can bring about a fairer reality through the ethics of collectivity. It is only together, in dialogue and compassion, that we can express the relational Imago Trinitatis.