The population explosion is an ecological phenomenon of displacement. Unless we solve that ecological problem of displacing people - to build huge dams, to build motorways, to take away what people need in order to survive - we will keep pumping more and more money into population programs. We will have more and more coercive and violent methods through which women's bodies are treated as experimental grounds for new contraceptives. Yet we will not have a solution to the problem of numbers.

It is from the Himalayan forests and ecosystems that I learned most of what I know about ecology.

For example, the idea that objects have properties out there in fixed ways is an incorrect idea about the world. Properties are created through relationships and processes. They are not inherent in electrons or photons or quanta any more than they are inherent in soil or trees or people. So my critique of reductionistic science is a critique that I have inherited from my scientific training. But it has been deepened by my experiences as an ecologist, in seeing the ecological destruction taking place today.

The primary threat to nature and people today comes from centralising and monopolising power and control. Not until diversity is made the logic of production will there be a chance for sustainability, justice and peace. Cultivating and conserving diversity is no luxury in our times: it is a survival imperative.

One of the movements we have developed is to say that, just as intellectual property rights protect the inventions of individuals, common rights are needed to protect the common intellectual heritage of indigenous peoples. These are rights that are recognized through the Convention on Biological Diversity. We are working to make sure that they become foundations of our jurisprudence.

The abuse of the Earth is the ecological crisis.

We are in a strange kind of time, where the kind of liberation movements such as anti-apartheid movements and freedom struggles in India need to be reinvented. We need to retool them so that all the gains that our generation has made can be passed on to future generations.