This blog post draws on neuroscientist Hannah Critchlow’s book, brain-science-books/”>The 21st Century Brain. She explores how intentionally building mental flexibility and often-overlooked cognitive skills can help us thrive as artificial intelligence keeps shaking up society.
Critchlow doesn’t just write for her family—she’s talking to anyone facing middle age or rapid change. She points to neuroscience-backed practices that nurture social connection, spark innovation, and boost problem-solving in daily life.
Thrive in the AI era: the core thesis
Critchlow believes we can teach ourselves to adapt by focusing on a handful of underappreciated capacities. These include emotional intelligence, empathy, creativity, a greater tolerance for uncertainty, and long-term thinking.
She argues these skills help us build stronger relationships and collaborate better. They also sharpen our problem-solving as AI transforms workplaces and communities.
Key overlooked skills
Emotional intelligence and empathy tie into life satisfaction, relationship quality, and academic success. Genetics play a part, but we can strengthen these skills through practice—things like self-compassion and seeing the world from others’ perspectives.
If you want to work on these abilities, here are a few ideas:
- Practice self-compassion to boost emotional regulation and resilience.
- Try active listening and perspective-taking to deepen empathy.
- Make time for mind-wandering or reflective journaling to spark creative thinking.
- Seek out new experiences to build your uncertainty tolerance.
- Set long-term goals and check in with yourself regularly to grow long-term thinking.
Biology behind behaviour: gut-brain axis and energy supply
Critchlow goes beyond social skills and digs into biology as the engine of cognition. The gut microbiome might influence altruistic behaviour, possibly through neurotransmitters and vagal signals to brain regions that steer our decisions.
This research hints that what we eat and how we care for our gut could nudge our social choices and cognitive style in subtle ways.
The brain’s energy needs are another big piece. Mitochondrial health—the bioenergetics that keep neurons firing—matters a lot when you think about how the brain needs clean, steady energy for learning, complex thought, and adapting to change.
Gut microbiome and altruism
New studies suggest that gut microbes can shape behavior in ways that encourage social cooperation. The science is still developing, but this gut-brain axis shows how our lifestyle choices—especially diet and gut health—might ripple into how we think and interact.
Mitochondrial health and cognitive energy
Higher-level thinking relies on strong energy delivery, so protecting mitochondrial function is practical. Critchlow recommends routines that keep mitochondria healthy: good nutrition, regular movement, enough sleep, and reducing oxidative stress in your environment.
Creativity and cognitive rhythms
Critchlow points out that creativity comes from certain brain states. Mind-wandering, time in nature, and alpha rhythms all support creativity, along with the rhythms of sleep and relaxed transitions that let the brain make fresh connections.
The role of alpha rhythms and relaxed states
Taking breaks—resting, letting your mind drift, getting outside—can spark creative insight. These moments help the brain reorganize information and link up ideas you might not expect.
Lifestyle interventions to support cognitive function
Critchlow suggests practical ways to boost both mitochondrial energy and cognitive flexibility. She wants readers to weave diet, movement, sleep, outdoor time, and mental habits into their routines, almost like a shield against the chaos of modern life.
- Diet that keeps energy steady and supports gut health, which in turn helps the brain do its job.
- Regular physical activity to spark new brain cell growth and keep neural connections flexible.
- Quality sleep so your brain can lock in what you’ve learned and recharge for tomorrow.
- Time outdoors for a mental reset and a bit of that nature-powered clarity.
- Mental habits—mindfulness, self-compassion, curiosity, and a bit of reflection—to build up attention, resilience, and problem-solving skills.
Here is the source article for this story: A neuroscientist’s guide to future-proofing your brain and thinking smarter in the 21st Century