But this dark vision was rooted in his belief that a better, more equal world was achievable, a belief which inspired classics like The Road to Wigan Pier and Homage to Catalonia, as well as essays like The Lion and the Unicorn, which looked forward to the recreation of England after World War II.

In 1946, Looking back on his journey to becoming a writer, Orwell claimed that his main motivation was ‘political purpose’, which he defined in the widest possible sense as a “desire to push the world in a certain direction, to alter other people’s idea of the kind of society that they should strive after’.

Orwell’s desire to push the world in a certain direction inspired later writers and campaigners whether in politics, journalism or civil society, as well as countless individual readers.

But it was also the turbulent times he lived in which made George Orwell the writer he was.

Orwell was writing during two of the most momentous decades of the 20th century, the 1930s and the 1940s, when the kind of society people should strive after was fiercely contested.

As conflict spiralled around the globe, powerful ideologies like fascism, communism and socialism reshaped politics, and scientific and technological progress opened up new scope for human action, writers and commentators believed that the world was on the brink of a disorientating multitude of possible futures.

What Orwell wrote was a direct result of the actions he took. His investigations into homelessness in London and Paris, and the life of the labouring poor in the north of England, made him a fierce critic of inequality.

In 1936 Orwell went to Spain to fight in the Spanish Civil War as part of the ‘International Brigade’, socialists from across the world who were committed to supporting the Republican government. Orwell returned to England (only just escaping with his life).

He later said that all of his work since 1936 “has been written, directly or directly, against totalitarians and for democratic socialism as I understand it”.

Although a committed socialist, Orwell was often sceptical of the motivations behind grand claims to transform society.

In many of his essays, he asked perceptive questions of the utopian visions which many of his fellow reformers, inspired by rapid technological advances and optimistic visions of human nature, were caught up in.

“All ‘favourable’ Utopias,” Orwell wrote, “seem to be alike in postulating perfection while being unable to suggest happiness.”

As the dark visions of revolutions ‘gone wrong’ in Animal Farm (1945) and Nineteen Eighty-Four (1949) suggest, Orwell was not confident that change is always for the better.

Yet these novels were also born out of a conviction that the futures they described did not have to happen if ordinary people were vigilant and defended the values they believed in.

Orwell described Nineteen Eighty-Four, with its dark vision of a bureaucratic state, the denial of objective truth and crushing of individual freedom as a ‘warning’.

“The moral to be drawn from this dangerous nightmare situation is a simple one,” he said when Nineteen Eighty-Four was published. “Don’t let it happen. It depends on you.”