With a radical home secretary making Huxley an inspector of fisheries in 1881, his pay was finally augmented. But so was the strain. The final blow came as his talented daughter Marian went mad after 1882 (she died in Paris, under the care of the renowned neurologist Jean-Martin Charcot, in 1887). A distraught, overworked Huxley resigned his professorship at the Normal School of Science (the future novelist H.G. Wells sat his last course) and the presidency of the Royal Society in 1885. He was awarded a state pension of £1,200 a year by the Liberal prime minister William Ewart Gladstone, even though Huxley—ever the polemicist—struck out against Gladstone’s Irish Home Rule policy, dissected his scriptural literalism, and refuted his attempt to reconcile the fossil evidence with the order of Creation listed in the book of Genesis.

Grieving for his daughter, Huxley in “The Struggle for Existence in Human Society” (1887) adopted a bitter social Darwinism—a term that would itself be introduced about 1890. Accepting Darwin’s Malthusian belief that overpopulation was the rule, Huxley maintained that the inevitable struggle and death undermined any possibility of socialist cooperation, which was back in contention after the socialist revival of 1886. He was answered by the anarchist prince Peter Kropotkin in Mutual Aid (1902). Huxley also nationalized the Darwinian struggle; he saw the industrial powers competing, making workforce training obligatory to win the economic “battle.” His last major talk was on “Evolution and Ethics” at the University of Oxford in 1893. Mellower now, six years after Marian’s death, Huxley used the occasion to detach benign human ethics from natural competition. Darwin’s “war”—between animals or industrial nations—had no place in our personal lives, he said. Society grows as we curb these “anti-social” animal instincts—it advances through the selection of individuals who are ethically the best, rather than physically the fittest.

Huxley suffered from pleurisy and heart disease in London’s smog, and the family moved to Eastbourne, on the Sussex coast, in 1890. Huxley was now an elder statesman of science, his once-radical ideas the foundations of the new Establishment. Agnosticism was equated with nonsectarianism; a lord chief justice in 1883 declared that Christianity was no longer the law of the land in England, with the caveat that while Huxley’s reverent questioning was now legal, vulgar working-class attacks on Christian beliefs were still indictable. Huxley’s brand of national Darwinism turned science against socialism and made naturalism synonymous with patriotism. The professions, including those in science, were accumulating power. He was also patriarch of an expanding intellectual dynasty. His son Leonard was a prominent editor, and three grandchildren would earn their own fame: Julian and Andrew as biologists and Aldous as a writer. It was this Huxley, as much a Unionist and nationalist as a brilliant propagandist for science, who was appointed to the Privy Council by the Conservative prime minister Robert Cecil, 3rd marquis of Salisbury, in 1892.

And so it was the Right Honourable Huxley who died of a heart attack on June 29, 1895—typically, midway through a defense of agnosticism. Huxley was buried on July 4, 1895, next to his tiny son Noel in St. Marylebone Cemetery, in Finchley, north London, his funeral being attended by a constellation of the greatest Victorian scientists.