Grand Transitions

Résumé du livre

Vaclav Smil is an interdisciplinary researcher who has authored hundreds of books and papers on energy, the environment, and population development, food production, the history of technical innovation, risk assessment, and public policy.

Japan exemplifies the profound global shifts in population, urbanization, and resource use. Over the next 50 years, its population will shrink by 45 million, with nearly 40% aged 65 or older by 2040, straining healthcare and welfare systems while facing a shortage of younger workers. Urbanization, seen in Tokyo’s sprawling megacity, exacerbates environmental pressures, as urban dwellers consume far more resources than rural populations. These demographic changes parallel broader transitions worldwide, such as China’s rapid economic and agricultural transformations, which lifted millions from poverty but also widened inequality and strained resources. While technological advancements and modern agriculture have improved living standards and reduced famine, they’ve also introduced challenges like obesity, food waste, and environmental degradation. Humanity’s impact on the planet is vast, with biodiversity loss and climate change presenting urgent challenges. Energy transitions, though promising, remain gradual, as fossil fuels dominate and renewable adoption lags. Economic growth, while raising living standards, often deepens inequality and environmental strain. Despite these complexities, humanity’s adaptability offers hope, emphasizing the need for balanced, flexible approaches to navigate an uncertain future.

"Life’s great dichotomy is between autotrophs, organisms that can nourish themselves, and heterotrophs, or life forms that must feed on other organisms."

"Most people in affluent and middle-income countries worry about what is best to eat in order to maintain or improve their health and extend their longevity, not whether they will have enough to survive."

"Energy is the only truly universal currency, and nothing (from galactic rotations to ephemeral insect lives) can take place without its transformations."

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