Update your knowledge. Some knowledge goes out of date quickly. Technology, countries, societies, cultures, and religions are constantly changing.
What I'm really worried about is war. Will the former rich countries really accept a completely changed world economy, and a shift of power away from where it has been the last 50 to 100 to 150 years, back to Asia?
My best friend in medical school was a magician. And we were shown an X-ray of a sword-swallower, and I tried it and failed. Then I got a sword-swallower as a patient, and he taught me.
I meet so many that think population growth is a major problem in regard to climate change. But the number of children born per year in the world has stopped growing since 1990. The total number of children below 15 years of age in the world are now relatively stable around 2 billion.
I am a toxico-nutritional neuro-epidemiologist. It's the study of neurological disorders caused by a mixture of toxins and malnutrition using epidemiological methods... We are just three or four in the world, even fewer than sword swallowers.
The 1 to 2 billion poorest in the world, who don't have food for the day, suffer from the worst disease: globalization deficiency. The way globalization is occurring could be much better, but the worst thing is not being part of it. For those people, we need to support good civil societies and governments.