As well as his work establishing the Order of Interbeing, Thich Nhat Hanh is best known for his peace activism, especially advocating for the victims and displaced people of the Vietnam War. He joined forces with many Christian, Jewish, Hindu and Muslim leaders to call for the end to human trafficking later in life and was a correspondent with Dr Martin Luther King during the civil rights campaign he led. However, it is for his books, most of which are devoted to mindfulness and other aspects of Buddhist teaching for which he is more revered.