This book contains ideas and thoughts from these philosophers:

- Martha Nussbaum: At the heart of Nussbaum's intellectual journey is the development of the capabilities approach, a framework she co-created with economist Amartya Sen. This approach is centered on the idea that justice should be evaluated based on individuals' abilities to function and achieve various important life goals, rather than simply on income or wealth. The capabilities approach emphasizes human dignity and focuses on the conditions that allow people to live lives they have reason to value. It challenges traditional views of social justice by broadening the scope of what constitutes a flourishing life beyond mere economic success.

- Peter Singer: Peter Singer is one of the most influential philosophers in contemporary ethics, known for his contributions to utilitarianism, animal rights, global poverty, bioethics, and environmental ethics. His ethical philosophy is grounded in the principle of utilitarianism, which holds that the right course of action is the one that produces the greatest overall happiness or well-being. Singer's work is characterized by a practical, results-oriented approach, focusing on how ethical principles can be applied to real-world issues to alleviate suffering and promote well-being. His influential works, such as Animal Liberation and The Life You Can Save, challenge readers to consider the moral implications of their actions in a variety of contexts, from how they treat animals to how they engage with global poverty.