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Determined: A Science of Life without Free Will
Robert M. Sapolsky • 2023
The book challenges the notion of free will, arguing that human behavior is an unbroken chain of biological and environmental causes stretching from evolutionary history to immediate neural activity. Sapolsky contends that every action is determined by factors beyond individual control, including genetics, prenatal conditions, childhood experiences, and neurobiology. This deterministic perspective, supported by evidence from neuroscience, chaos theory, and emergent complexity, suggests that concepts like blame, moral responsibility, and earned entitlement are fundamentally flawed. The author explores how society can transition towards a more humane approach to justice and human suffering by embracing a scientific understanding of behavior, moving past retribution to focus on prevention and compassion.
The book argues that exercise is crucial for building and conditioning the brain, not just the body. It explains how human evolution is tied to movement, making modern sedentary lifestyles detrimental to cognitive function. Through scientific evidence and case studies like the Naperville school district, the text demonstrates that physical activity balances neurotransmitters, triggers growth factors like BDNF, and improves brain plasticity. It highlights exercise as an effective intervention for learning, stress, anxiety, depression, ADHD, addiction, and the challenges of aging and hormonal changes, emphasizing its role in boosting mood, focus, memory, and overall mental resilience by physically rewiring the brain.
The hungry brain : outsmarting the instincts that make us overeat
Stephan J. Guyenet
The book reveals why humans struggle with weight in a modern food-abundant world, attributing it to an evolutionary mismatch between our ancient brain circuits and contemporary environments. It details how the basal ganglia, driven by dopamine, reinforces calorie-seeking behaviors and learns cravings, making highly palatable foods addictive. The text explores the brain's satiety systems, particularly the hypothalamus and leptin, and how modern diets, stress, and poor sleep disrupt these mechanisms, raising our adiposity set point. Ultimately, it argues that overcoming overeating requires understanding and working with our nonconscious brain systems, advocating for environmental restructuring and lifestyle changes over sheer willpower.
The author argues that morality can be a science, grounded in objective facts about the well-being of conscious creatures. It challenges the fact-value divide, critiquing both religious dogmatism and moral relativism. The author proposes a "moral landscape" where peaks represent flourishing and valleys denote suffering, asserting that scientific truths about human neurophysiology, social emotions, and cultural institutions can guide us towards optimal well-being. The book explores the neurological basis of belief, the illusion of free will, and the evolutionary origins of moral impulses, concluding that a scientific understanding can lead to a universal framework for moral wisdom, moving humanity beyond faith-based ignorance and toward greater happiness.