In 2015, Pope Francis released his encyclical Laudato Si: On Care for Our Common Home, a powerful and striking text that put the Catholic leader at the forefront of environmentalism and social justice, while helping endear him to many non-Catholics. We spoke to Father Jim Keenan, a Jesuit priest who has been an outspoken leader in ethical thought and a bridge-builder between many faiths, to get his take on what it all means.