Forests and meat animals compete for the same land. The prodigious appetite of the affluent nations for meat means that agribusiness can pay more than those who want to preserve or restore the forest. We are, quite literally, gambling with the future of our planet – for the sake of hamburgers

I don't think nationalism is alone holding the field; it's in contention with a lot of different things.

Remember that not everyone is as strong as you are. Be mindful of human weakness, and of the fact that it may be more important, in the long run, to get many people taking steps in the right direction than to have fewer achieving the ideal.

I'm not overly alarmist about it, but I do think there are some worrying signs, like the growing accumulation of wealth by a very small proportion of the population, plus elections in the US are much more dominated by money than anywhere else calling itself a democracy.

If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

If you earn a lot of money, you can give away a lot of money.

In appropriate circumstances we are justified in using humans to achieve goals (or the goal of assisting animals).