Taku's Blog++: As Civilization Advances, Birthrates Decline: From Growth to Maturity in a Changing World

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激変時代の人生再構築７日間合宿

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Feeling burnt out from all the learning?
Come here with the intention to stretch yourself—just a little!

Have you heard of the mouse experiment "Universe 25"?

Please watch it first！

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Phase 1: The Inevitable Decline in Population

While the global population appears to be increasing, developed countries are experiencing significant declines in birthrates.
Even countries like China and India are seeing fertility rates drop below 2.0, with forecasts predicting a global population peak of 9.7 billion around 2064.
This may not just be a regional issue, but rather a universal trend: the more advanced a civilization becomes, the lower its birthrate.

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Phase 2: Overview of the Universe 25 Experiment

Researcher: John B. Calhoun, an American ethologist.
Purpose: To observe how mice behave in an ideal urban environment.
Conditions: A utopian setting with unlimited food, water, and space.
Starting point: Four pairs of mice (8 total), placed in an enclosure capable of supporting up to 3,840.

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Phase 3: The Four Phases of Societal Collapse

Phase A: Adaptation and Settlement (up to Day 104)

The mice adapted to their environment and began nesting and reproducing.

Phase B: Population Growth (up to Day 315)

The population increased steadily, reaching 620 mice.

Phase C: Emergence of Abnormal Behavior and Social Breakdown

Mice began clustering aimlessly, and behaviors became increasingly uniform.
Some males became hyper-aggressive and territorial (Alpha Males), while others turned passive and withdrawn—so-called “dropout mice.”
Females began neglecting their young, showed aggression, and stopped protecting offspring.
Many young mice failed to develop social behaviors, leading to a generation unable to become parents.

Phase D: Collapse of Reproduction and Extinction

Reproduction ceased entirely. The population peaked at 2,200 and then declined.
After 920 days, the last mouse died. The colony was extinct.

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Phase 4: What This Means for Humanity

Like the mice, human societies tend to lose social cohesion, reproductive drive, and a sense of responsibility once basic needs are fully met.
The dynamics of dominance, isolation of the weak, and widespread apathy mirror issues in modern society—such as social withdrawal and the rise of the “herbivore” generation.
The decline in births may not be a gentle form of population control, but rather a sign of functional collapse in society.

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Phase 5: How Do We Go Beyond Universe 25?

Strategy 1: Rethink Urban Structures

Move away from centralized, high-rise urban models and toward more distributed living environments.
Just like the mice that unnecessarily gathered together, humans are also drawn to “Alpha Male cultures,” forcing themselves to cluster in competitive urban spaces.

Strategy 2: Redesign Birth and Parenting Systems

We are already exploring ways to separate reproduction from the human body (artificial wombs, surrogacy, reliance on immigration).
Realistically, we are shifting toward a society where reproduction is increasingly outsourced.

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Conclusion: What Humanity Faces Is Not Utopia, but Social Dysfunction

Universe 25 reveals a chilling possibility: a quiet extinction at the peak of abundance.
Even if food, shelter, and comfort are secured, if the will to live and sense of connection fade, civilization itself will collapse.
This is a stark warning: we may already have one foot in a dystopia.

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In a future shaped by an aging society, population decline, and a world where childbirth becomes rare, there are still those who shine brilliantly.

Their impact isn't built on traditional notions of numbers or growth, but rooted in a new kind of value creation.

↓↓↓ Who are these people? ↓↓↓

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❶【Types of People Shaping the Future】

① Those Who Create Connection

Examples: Community designers, local facilitators, shared housing coordinators
Role: Preventing isolation and disconnection by linking people to people, generations to generations, heart to heart
Contribution to society: Rebuilding human relationships to restore emotional well-being and a sense of belonging

② Those Who Offer Care and Healing

Examples: Nurses, care workers, touch-care therapists, specialists in thanatology
Role: Gently supporting the realities of life—aging, illness, and death
Contribution to society: Encouraging a renewed appreciation of caregiving, shifting societal values from functionality to empathy and the affirmation of existence

③ Those Who Weave Meaning and Story

Examples: Philosophers, poets, writers, narrative designers working with AI
Role: Transforming themes like life, death, loneliness, and powerlessness into expression through words and storytelling
Contribution to society: Filling the void of meaning and reinforcing the spiritual backbone of society

④ Those Who Bridge Technology and Ethics

Examples: AI ethics consultants, bioethics researchers, artificial womb developers
Role: Seeking harmony between emerging technologies and human dignity
Contribution to society: Designing a vision of the future that preserves our humanity amid rapid innovation

⑤ Those Who Bring Creation and Play

Examples: Artists, game creators, experience designers
Role: Introducing joy, beauty, and wonder into society
Contribution to society: Even in aging or isolated communities, they move the heart and remind us of the joy of being alive

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❷【What Do Their Jobs Look Like? — Fields & Roles】

Field	Examples of Specific Roles
Care & End-of-Life Support	In-home care coach / End-of-life guide / Grief counselor
Community Building	Community designer / Coordinator for nomadic-style settlements
Technology	Artificial womb engineer / Co-parenting support specialist collaborating with AI
Creative Expression	Children's book author / End-of-life experience producer / Fashion creator for seniors
Education & Consciousness	Philosophy café host / Mindfulness instructor / Life story editor

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❸【The Society They Experience】

■ Key Social Characteristics

Steady-State Society (Zero Growth):
Economic growth is no longer the main goal—well-being, empathy, and quality of life become the new metrics of value.
Coexistence of Loneliness and Connection:
As individualism deepens, so does the longing for small, meaningful connections.
Coexistence with AI:
Traditional labor decreases, while the uniquely human capacity to create meaning, play, and beauty becomes more essential.
Redefinition of Family:
Emotional bonds ("heart connections") take precedence over blood ties in forming familial relationships.

■ Concrete Experiences:

Facing aging and death not as tragedies, but as expressions of aesthetics and meaning
In a society with fewer children, the role of “raising” extends to others’ children—and even to AI
People are valued not for being “useful,” but for being worthy of presence and shared existence
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❹【Finally: The Gift They Offer to Society】

Not hope as we once knew it, but a redefined hope
Not growth, but depth
Not efficiency, but beauty
Not high fertility, but meaningful legacy

These individuals are like beacons—guiding lights as the world shifts
from a paradigm of increase to one of ripening.

In a future shaped by an aging society, population decline, and a world without childbirth,
what kind of leaders will truly resonate with people's hearts?

What messages must be shared?

This is not a peripheral question—
it strikes at the heart of how we will rebuild trust and hope in the societies of tomorrow.

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🔷 Phase 1: Why Do We Need “Communicative Leaders”?

The Social Challenges Behind the Need

The collapse of the growth myth (GDP and birthrates no longer define well-being)
A rapidly isolating society (nuclear families → solo living → social disconnection)
Widespread loss of meaning (in work, family, and life itself)
The rise of AI shaking the foundations of human identity and purpose

☞ Amid these shifts, many are losing sight of how to live—and what to believe in.

What we need now is:

Narrative-based leaders—those who can offer meaning, story, and hope.

🔷 Phase 2: The 3 Key Qualities of Resonant Leaders

Quality	Description	Example Phrase
① Empathy	The foundation of psychological safety—able to meet pain, fear, and confusion without judgment	“I’ve felt that way too.”
② Perspective	The ability to zoom out—seeing history, technology, and society from a wide angle to show the bigger picture	“Where are we now, in the flow of time?”
③ Creativity	Instead of offering the “right answer,” they share meaningful questions and beautiful hypotheses	“What if we tried living this way?”

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🔷 Phase 3: 5 Core Messages Future Leaders Must Communicate

Message	Purpose	Example Expression
① “You’re allowed to create your own meaning in life.”	To free people from externally imposed sources of meaning (family roles, success, societal norms)	“Choose curiosity over obligation.”
② “Each of us is a co-creator of this era.”	To inspire a sense of agency in shaping the future	“When you move, the times move too.”
③ “The value of life lies in its quality, not quantity.”	To shift away from growth, fertility, and expansion—toward depth, relationships, and lived experience	“Let’s explore what a ripened life could look like.”
④ “The future is not a competition, but a collaboration.”	To propose a vision that transcends division and rivalry	“Let’s choose connection over being ‘right.’”
⑤ “You are valuable simply by being here.”	To move from valuing people for their utility, to honoring their presence	“Just your presence brings joy.”

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🔷 Phase 4: Why Will This Type of Leadership Resonate? (Theoretical Foundations)

① Maslow’s Hierarchy of Needs Reframed

In a growth-driven society, the focus was on physiological and safety needs
In a highly mature society, self-actualization and transcendence become central
☞ Messages that speak to these higher needs will resonate more deeply today

② The Age of Purpose

Both companies and individuals are now asked: "Why do you exist?"
☞ What people seek is not definitive answers, but open questions and co-creative space
Leaders who hold space for inquiry are increasingly valued

③ The Rise of Narrative Consumption

Numbers and data no longer move people—stories they can relate to do
☞ It’s the authentic, vulnerable leader who shares their struggles and humanity that inspires action

🔷 Phase 5: What Kind of Society Will These Leaders Experience?

Leaders will live like guardians of micro-societies—surrounded not by mass followers, but loyal fans who resonate with their message
Communities will form based on shared meaning, transcending age, gender, and social status
They won’t lead through commands or information, but through atmosphere, words, and presence
Success will not be measured by economic output, but by inner resonance and connection

🔷 Conclusion: What Defines a Hit Leader from Here On?

A leader who illuminates others with meaning, not numbers
A leader who can transform uncertainty about the future into a story of hope

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Feel your body.
When we become aware of reality, our subconscious begins to speak to us through bodily sensations. Take discomfort, for example. In order to escape it, we choose certain thoughts or emotions.

When this rises into the realm of conscious awareness, it transforms into thought—our chosen language. When an emotion surfaces, ask yourself:
“What sensation am I trying to avoid by choosing this emotion?”
Then, gently bring your attention back to your body.

Stay close to the sensation you uncover.

You may find it softening, fading, or no longer feeling unpleasant.

This quiet act of being with your body—almost like meditation—is a moment of subtle yet powerful reality creation.