Mr Money Mustache is also on that diet. But his version is more vegetable/nuts based - he eats lots of avocados, salads with olive oil, coconut oil, and so on.
I’m not sure if it is not sustainable. The basic rule of economics is that if demand is growing with fixed supply, then the price is rising - this, in turn, attracts capital investments because of the bigger return on capital. The more capital is invested, the bigger production and thus supply - this equilibrates the market back to normal, sustainable price which clears the market and satisfies all demand.
Once one understands this basic mechanism, then it’s hard to be as alarmist as some ecologists are - besides 200 years ago people (Thomas Malthus) were saying “we’re running out of food, population is growing too fast to support itself”, 100 years ago people (William Jevons) were saying “we’re running out of coal, the population is using coal too fast”, 30 years ago people (Club of Rome) started saying “we’re running out of oil, world is using oil too fast”. People basically can’t imagine the exponential changes in the technology of production thanks to capital investments - it’s hard to imagine exponential changes, just like compound interest.
I think the solution to overfishing is privatisation of the waters. Just like the solution to deforestation in many developed countries (for example Sweden) was privatisation of forests.
Speaking of climate change, I’m generally of opinion of these two economists.
Totally agree. If you add to that list potatoes, bread, pasta and grain - you end up with low-carb diet. I think it’s in general important to not eat sugar and carbs with high glycemic/insulin index.