I was educated at Cambridge (BA, 1999 - 2002; MPhil 2007 - 2008; PhD 2008 - 2012), and was a Research Fellow at Sidney Sussex College, Cambridge (2012 - 2013) before taking up my post in Oxford. Between degrees I served as an officer with the Royal Marines Commandos. 
   
  
      Edited volume
| 2017 | 
The Philosophy of Trust, ed. P. Faulkner and T. Simpson. Oxford University Press | 
 
 
Recent articles
| 2019 | 
Freedom and Trust: A Rejoinder to Lovett and Pettit. Philosophy and Public Affairs 47: 412-24 | 
| 2018 | 
Trust, Belief and the Second Personal. Australasian Journal of Philosophy 96: 447-59 | 
| 2017 | 
The Impossibility of Republican Freedom. Philosophy and Public Affairs 45: 27-53 | 
| 2016 | 
Just War and Robots' Killings (with V. Müller) Philosophical Quarterly 66: 302-22 | 
 
 
   
  
      The centre of my work is on trust, addressing both trust between individuals, and the social and political significance of a culture of trust. I have additional research interests in a variety of applied issues, ethical and political - especially war, technology, and their intersection; and academic freedom - and I am increasingly working on topics in political philosophy.
   
  
      I co-teach 'Foundations', a core module on the Masters in Public Policy at the Blavatnik School of Government. This looks at the moral and political issues that are involved in policy-making.