Sanjay Modgil is a reader in Artificial Intelligence and head of the Reasoning and Planning Group, King's College London. His main research and teaching interests are in the areas of Logic, Argumentation and Dialogue, and the Philosophy and Ethics of Artificial Intelligence. He works on non-monotonic logics, argumentation theory and dialectical models of reasoning that enable distributed reasoning amongst multiple agents; in particular, dialectical models of logic-based reasoning that are provably rational under resource bounds, and models of logic-based argumentation that accommodate reasoning about preferences and values. More recently, he has focussed on the ethics of AI, and development of the above models of dialectical reasoning so as to integrate human and artificial agent reasoning through dialogue; the long term aim being to ensure that the AI machines of the future make decisions that are aligned with human values and preferences.