Humans, the supremely social mammals, are ethical and intellectual sponges. We unconsciously absorb, for good or ill, the influences that surround us.

I do not want to abandon representative democracy. I want to see it balanced by popular sovereignty, especially the variety known as deliberative democracy.

When you warn people about the dangers of climate change, they call you a saint. When you explain what needs to be done to stop it, they call you a communist.

Yes, the car is still useful - for a few people it's essential. It would make a good servant. But it has become our master, and it spoils everything it touches.

If global warming is not contained, the West will face a choice of a refugee crisis of unimaginable proportions, or direct complicity in crimes against humanity.

I became an environmentalist because I love the living world, but I spend much of my life thinking about electricity, industrial processes and civil engineering.

It does not matter whether we burn fossil fuels with malice or with love. As far as the atmosphere is concerned, it is not concerned. It is a collection of gases.

What you see is not what others see. We inhabit parallel worlds of perception, bounded by our interests and experience. What is obvious to some is invisible to others.

After 12,000 years of feeding humankind, all farming except fruit and veg production is likely to be replaced by ferming: brewing microbes through precision fermentation.

I believe resilience is the most useful human quality, and I've sought to cultivate it, but in 2019 I felt my resolve begin to weaken at times as it has never done before.

If commercial fishing were excluded from large areas of the sea, the total catch would be likely, paradoxically, to rise, due to what biologists call the spillover effect.

We would do well to ask why governments seem to find it so easy to raise the money required to wreck the biosphere, and so difficult to raise the money required to save it.

Sometimes I wonder whether anything is learned in conservation, or whether the big NGOs are for ever destined to follow a circular track, endlessly repeating their mistakes.

Representative democracy is a remarkably blunt instrument. Hundreds of issues are bundled together at every election, yet the vote tends to swing on just one or two of them.

Thinking like ethical people, dressing like ethical people, decorating our homes like ethical people makes not a damn of difference unless we also behave like ethical people.

If you construct political narratives around the psychodramas of politicians, even when they don't invite it, you open the way for those who can play this game more effectively.

Farmfree production promises a far more stable and reliable food supply that can be grown anywhere, even in countries without farmland. It could be crucial to ending world hunger.

The grim truth is that the rich are able to live as they do only because others are poor: there is neither the physical nor ecological space for everyone to pursue private luxury.

In talking about my cancer with family and friends, I feel the love that I know will get me through this. The old strategy of suffering in silence could not have been more misguided.

Until fishing is properly regulated and contained, we should withdraw our consent. Save your plastic bags by all means, but if you really want to make a difference, stop eating fish.

Healthy populations of predatory crabs and fish protect the carbon in salt marshes, as they prevent herbivorous crabs and snails wiping out the plants that hold the marshes together.

Surplus money allows some people to exercise inordinate power over others: in the workplace; in politics; and above all in the capture, use and destruction of the planet's natural wealth.

The struggle to save every possible species and ecosystem from the current wave of destruction is worthwhile. One day, perhaps within our lifetimes, they could repopulate a thriving world.

Development which has no regard for whom or what it harms is not development. It is the opposite of progress, damaging the Earth's capacity to support us and the rest of its living systems.

Public figures talk and act as if environmental change will be linear and gradual. But the Earth's systems are highly complex, and complex systems do not respond to pressure in linear ways.

For many years, wildlife film-making has presented a pristine living world. It has created an impression of security and abundance, even in places afflicted by cascading ecological collapse.

Landowners, farmers and gamekeepers, though they comprise a small minority of the rural population, claim to speak for everyone, and dismiss those who challenge them as interfering urbanites.

It is a campaign not for abundance but for austerity. It is a campaign not for more freedom but for less. Strangest of all, it is a campaign not just against other people, but against ourselves.

The age-old mistake, which has stunted countless lives, is the assumption that because physical hardship in childhood makes you physically tough, emotional hardship must make you emotionally tough.

If I could turn back the clock, magically deleting my prostate cancer, the surgery I needed and its complications, would I do so? It seems an odd question. But I find it surprisingly hard to answer.

Farming and fishing are the major causes of the collapse of both marine and terrestrial ecosystems. Meat - consumed in greater quantities by the rich than by the poor - is the strongest cause of all.

When expressions of emotion are dangerous, and when you are constantly told that this terrible thing is being done for your own good, you quickly learn to hide your true feelings, even from yourself.

Few people younger than me know that it was once normal to see fields white with mushrooms, or rivers black with eels at the autumn equinox, or that every patch of nettles was once reamed by caterpillars.

While arguments rage about plant- versus meat-based diets, new technologies will soon make them irrelevant. Before long, most of our food will come neither from animals nor plants, but from unicellular life.

The institutions founded 'to save succeeding generations from the scourge of war' have failed. Since the end of WW2, some thirty million people have been killed in armed conflict. Most of them were civilians.

Brexit, for all its likely harms, represents an opportunity to pay landowners and tenants to do something completely different, rather than spending yet more public money on trashing our life-support systems.

Rather than allowing Roma, Travellers and homeless people to be picked off, all those of us who fear the criminalisation of trespass should join forces with them, protecting their rights while we defend our own.

We can expect commercial enterprises to attempt whatever lawful ruses they can pull off. It is up to society, represented by government, to stop them, through the kind of regulation that has so far been lacking.

As Dutch elm disease spread across Britain in the 1970s, the country fell into mourning. When the sentinel trees that framed our horizons were felled, their loss was a constant topic of sad and angry conversation.

Only one of the many life support systems on which we depend - soils, aquifers, rainfall, ice, the pattern of winds and currents, pollinators, biological abundance and diversity - need fail for everything to slide.

Economic growth is the aggregate effect of the quest to accumulate capital and extract profit. Capitalism collapses without growth, yet perpetual growth on a finite planet leads inexorably to environmental calamity.

History shows that attacks on general freedoms often begin with an attack on the freedom of a minority. It teaches us that we should never allow a government to divide and rule. An attack on one is an attack on all.

When you are diagnosed with prostate cancer, your condition is ranked on the Gleason Score, which measures its level of aggression. Mine is graded at seven out of 10. But this doesn't tell me where I stand in general.

Emotionally damaged men all too often rip apart their own lives, and those of their partners and children. I see both physical fitness and emotional strength as virtues, but they are acquired by entirely different means.

We should continue to mobilise against the destruction of the world's great habitats, and its terrifying implications. But the most persuasive argument we can make is to show we mean it, by restoring our own lost wonders.

For some people, it is easier to command a nation, to send thousands to their deaths in unnecessary wars, to separate children from their families and inflict terrible suffering, than to process their own trauma and pain.

As some of us can testify, the viciousness of the lobby groups funded by the fossil fuel industry, and the publications that amplify their message, knows no limits. As we have already seen, they treat even children as fair game.

As the scale of economic activity increases until capitalism affects everything, from the atmosphere to the deep ocean floor, the entire planet becomes a sacrifice zone: we all inhabit the periphery of the profit-making machine.

I have lived long enough to witness the vanishing of wild mammals, butterflies, mayflies, songbirds and fish that I once feared my grandchildren would not experience: it has all happened faster than even the pessimists predicted.

The government argues that without a price, the living world is accorded no value, so irrational decisions are made. By costing nature, you ensure that it commands the investment and protection that other forms of capital attract.

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