"The Great Derangement: Climate Change and the Unthinkable", published by Penguin Books imprint Allen Lane, serves as Ghosh's summons to confront the most urgent task of our time.
That climate change casts a much smaller shadow within the landscape of literary fiction than it does even in the public arena is not hard to establish, the author says, adding to see that this is so one needs to only glance through the pages of a few highly-regarded literary journals and book reviews.
"Indeed, it could even be said that fiction that deals with climate change is almost by definition not of the kind that is taken seriously by serious literary journals; the mere mention of the subject is often enough to relegate a novel or a short story to the genre of science fiction. It is as though in the literary imagination climate change were somehow akin to extraterrestrials or interplanetary travel."
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"In thinking about the mismatch between my personal concerns and the content of my published work, I have come to be convinced that the discrepancy is not the result of personal predilections: it arises out of the peculiar forms of resistance that climate change presents to what is now regarded as serious fiction."
Are we deranged? Ghosh argues that future generations may well think so.
In the writing of history, too, the climate crisis has
Ghosh ends by suggesting that politics, much like literature, has become a matter of personal moral reckoning rather than an arena of collective action. But to limit fiction and politics to individual moral adventure comes at a great cost.
The climate crisis asks us to imagine other forms of human existence - a task to which fiction, Ghosh argues, is the best suited of all cultural forms.
According to the author, climate change also poses a powerful challenge to what is perhaps the single-most important political conception of the modern era: the idea of freedom, which is central not only to contemporary politics but also to the humanities, the arts and literature.
"In the last few decades, India has become very highly politicised; great numbers take to the streets to express indignation and outrage over a wide range of issues; on television channels and social media, people speak their minds ever more stridently. Yet climate change has not resulted in an outpouring of passion in the country," he writes.
"This despite the fact that India has innumerable environmental organisations and grassroots movements. The voices of the country's many eminent climate scientists, environmental activists and reporters do not appear to have made much of a mark either," he adds.