Shaj Mohan is an Indian philosopher. His philosophical works are in the areas of metaphysics, reason, philosophy of technology, philosophy of politics, and secrecy. Mohan's works are based on the principle of anastasis according to which philosophy is an ever-present possibility on the basis of a reinterpretation of reason.
 Mohan completed his early education in Thiruvananthapuram, Kerala, and studied philosophy at St. Stephen's College, Delhi where he taught for some time. He has academic degrees in economics and philosophy. Mohan is originally from Tirunelveli. His grandfather Nadaraja Pillai participated in the Indian independence movement with the congress party. 
 He has published in the areas of metaphysics, reason, nature, secrecy, philosophy of technology, and philosophy of politics.
 He has written philosophical essays against the rise of Hindu nationalism in The Indian Express, Mediapart, Outlook, La Croix, The Wire, The Caravan, Le Monde and Libération. As per Le Monde he has faced difficulties due to his political writings.
 In 2021 the American critical theory journal Episteme published a special issue on the philosophy of Mohan and Divya Dwivedi.
 Mohan's work shows a new possibility for philosophy which is neither metaphysics nor deconstruction, and its orientation was described as deconstructive materialism. According to Counter Currents there is “something which can be called a revolutionary theory, but not under that name” in his work.
 His work combines the formalism and argumentation of analytic philosophy with the intuitive exegetical style of continental philosophy. Mohan is credited with having "created a new voice in philosophy" resembling the style of prophesy. Mohan said that it is possible to practice philosophy without anchoring it to any tradition. He argued that the principle of reason has an important role in philosophy in spite of the criticisms of it in the 20th century. Reason exceeds mechanical thinking as it has a relation to "the obscure". This rethinking of the principle of reason is made possible through interpreting the philosophical tradition of faculties in a new way. His works are opposed to exceptionalist style of thinking, including state of exception.
 
Mohan wrote the book Gandhi and Philosophy: On Theological Anti-politics published by Bloomsbury Academic, UK with the philosopher Divya Dwivedi. Jean-Luc Nancy wrote the foreword to Gandhi and Philosophy and described the originality this work in terms of the relation shown by it between truth and suffering. Nancy wrote that this work creates the new beginning for philosophy following the end of metaphysics, This is how this book comes to our attention and contributes to orient us, if I may say so, toward a thought, and even a world, neither humanist nor reduced to suffering in the name of Truth. In the terms of this work: neither metaphysics nor hypophysics. Rachel Adams and Crain Soudien assert that Mohan's "thought is increasingly becoming one of the most radical and important contributions to the philosophy of the world, today".
 According to Jean-Luc Nancy Gandhi and Philosophy leads to a new orientation outside of the theological, metaphysical and nihilistic tendencies in philosophy. Bernard Stiegler said that this work "give us to reconsider the history of nihilism in the eschatological contemporaneity and shows its ultimate limits" and offers a new path. Gandhi and Philosophy calls this new beginning the anastasis of philosophy. Robert Bernasconi said that the inventiveness and the constructivism behind the concept of ana-stasis, or the overcoming of stasis, has a relation to the project of re-beginning of philosophy by Heidegger.
 Gandhi and Philosophy proposed that parallel to the metaphysical tendency in philosophy there is hypophysics. Hypophysics is defined as "a conception of nature as value". Mohan said "This non-philosophical system, which we call hypophysics, is necessarily interesting for philosophy. " The distance from nature that human beings and natural objects come to have through the effects of technology lessens their value, or brings them closer to evil. Gandhi's concept of passive force or nonviolence is an implication of his hypophysical commitment to nature. Livio Boni in  Le collectif de pantin noted that the concept of hypophysics is influenced by Kant. Hypophysics enables a rational reading of Gandhi’s works to learn from it without falling into the errors of mysticism.
 The philosophical direction outside of metaphysics and hypophysics is created through the invention of a new conceptual order. It is meant to enable philosophy to step outside the regime of sign, signifier, and text. The Book Review said that the philosophical project of Gandhi and Philosophy is to create new evaluative categories, "the authors, in engaging with Gandhi's thought, create their categories, at once descriptive and evaluative" while pointing to the difficulty given by the rigour of a "A seminal if difficult read for those with an appetite for philosophy". Some of the conceptual inventions have been noted to have come from mathematics and biology.
 
The constructionist tendency of Gandhi and Philosophy places it between the dominant philosophical styles of continental philosophy and analytical philosophy. The conclusion of Gandhi and Philosophy emphasizes the construction of a new dimension in philosophy.  Anastasis is the obscure beginning which would gather the occidental and the oriental to make of them a chrysalis and set off the imagos born with their own spans and skies; these skies and the imagos set against them will refuse to trade in orientations; and these skies will be invisible to the departed souls of Hegel who sought mercury in the darkest nights. Jean-Luc Nancy, Robert Bernasconi, Bernard Stiegler and Robert J. C. Young said that his work creates new possibilities for philosophy beyond the impasse of metaphysics and nihilism. American critical theory journal Episteme published a special issue of critical assessments of the philosophy of Mohan and Divya Dwivedi in 2021.
 Mohan's work on Gandhi was criticised from the point of view methodological and stylistic difficulty. Robert Bernasconi noted that Gandhi and Philosophy is a difficult book and it is "not a book that you will understand at first reading". The difficulty due to the constructivist style was noted by other authors as well.
 Gandhi and Philosophy was criticised from the point of view of the recent mounting criticisms of Gandhi in India and internationally. It was said that Gandhi and Philosophy might be exalting Gandhi while being very critical of him at the same time. The ambiguous approach to Gandhi was described in one of the commentaries in The Indian Express as "Mohan and Dwivedi have done a masterful job of avoiding the binary fork – hagiography or vituperation – as much of Gandhi and hagiography comes from a need to spiritualise Gandhi".
 Economic and Political Weekly pointed to Mohan and Dwivedi's participation in the paradigm of "western philosophy", especially when Gandhi's goal was to create an alternative to Eurocentrism. EPW said that his work may be of interest only to continental philosophy as he does not participate in Indic discourses.
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