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Friendship & Social Architecture
Mark Granovetter's 'Strength of Weak Ties' theory (1973) demonstrates that your most valuable information, opportunities, and novel perspectives come not from close friends (strong ties) but from acquaintances and distan…
Network StructureFriendship & Social Architecture
Friendship chemistry refers to the elusive 'click' that makes some relationships feel effortless while others remain cordial but flat, despite similar interests and values
Friendship ChemistryFriendship & Social Architecture
Social Portfolio Theory applies investment portfolio thinking to relationships: just as financial health requires diverse investments across asset classes, social health requires diverse relationships across types and fu…
Strategic Social DesignFriendship & Social Architecture
Healthy adult friendships maintain a rough balance of reciprocity over time — not transactional tit-for-tat but a general sense that both parties invest, initiate, and support at comparable levels
Friendship MaintenanceFriendship & Social Architecture
Adult friendships face predictable stress points at major life transitions — and most friendships that end don't end through conflict but through transition-driven divergence
Life TransitionsFriendship & Social Architecture
Ray Oldenburg's Third Place theory identifies the crucial role of informal public gathering places — distinct from home (first place) and work (second place) — in community life and individual well-being
Physical & Social SpaceFriendship & Social Architecture
Eric Klinenberg's concept of social infrastructure refers to the physical conditions that shape the possibility for social interaction: libraries, parks, sidewalks, community centers, playgrounds, and any shared space th…
Physical & Social SpaceFriendship & Social Architecture
Container Theory, drawing on Wilfred Bion's group dynamics work and Parker Palmer's circle of trust model, proposes that groups function well only when they have a strong 'container' — a set of agreements, practices, and…
Group DynamicsFriendship & Social Architecture
Ritual-Based Friendship Maintenance proposes that the most resilient adult friendships are maintained not by spontaneous contact but by recurring rituals — scheduled, predictable interactions that create maintenance on a…
Friendship MaintenanceFriendship & Social Architecture
Friendship breakups — the ending of significant friendships — are among the most painful and least discussed relational losses
Loss & EndingFriendship & Social Architecture
The Chosen Family Model describes the formation of family-like bonds outside biological or legal kinship — relationships characterized by the unconditional support, mutual obligation, and enduring commitment typically as…
Family & Chosen CommunityFriendship & Social Architecture
Robert Putnam's distinction between bridging and bonding social capital describes two fundamentally different types of social connection
Network StructureFriendship & Social Architecture
Hospitality as Social Architecture reframes hosting and gathering not as a personality trait ('I'm not a host') but as a design skill that creates the conditions for social connection
Strategic Social DesignFriendship & Social Architecture
The Proximity Principle (also called the propinquity effect) is one of the most robust findings in social psychology: physical proximity is the single strongest predictor of friendship formation, stronger than shared int…
Physical & Social SpaceFriendship & Social Architecture
This folk wisdom framework, popularized in various forms across self-help literature, categorizes friendships by their natural duration and purpose: Season friendships serve you during a specific life period (college fri…
Friendship FrameworksFriendship & Social Architecture
The Vulnerability Ladder describes the progressive depth of self-disclosure that moves friendships from superficial to intimate
Vulnerability & DepthGrief, Loss & Life Transitions
Elisabeth Kübler-Ross originally proposed five stages of grief—denial, anger, bargaining, depression, acceptance—as patterns observed in terminally ill patients
Grief Theories & ModelsGrief, Loss & Life Transitions
The Dual Process Model (DPM) proposes that healthy grieving involves oscillation between two orientations: loss-oriented coping (confronting the grief itself—crying, yearning, dwelling on the deceased) and restoration-or…
Grief Theories & ModelsGrief, Loss & Life Transitions
Continuing Bonds theory challenges the long-dominant 'breaking bonds' model of grief that prescribed emotional detachment from the deceased as the goal of healthy mourning
Grief Theories & ModelsGrief, Loss & Life Transitions
Pauline Boss identified a devastating form of grief that occurs when loss is unclear—when someone is physically present but psychologically absent (dementia, addiction, traumatic brain injury) or physically absent but ps…
Grief Theories & ModelsGrief, Loss & Life Transitions
Most grief—even intense, prolonged grief—is normal and resolves without clinical intervention
Grief Theories & ModelsGrief, Loss & Life Transitions
Kenneth Doka's concept of disenfranchised grief describes losses that are real but socially unrecognized—grief that is not openly acknowledged, publicly mourned, or socially supported
Grief Theories & ModelsGrief, Loss & Life Transitions
Robert Neimeyer's meaning reconstruction approach frames grief as fundamentally a process of remaking meaning in a world disrupted by loss
Meaning & Growth After LossGrief, Loss & Life Transitions
Ronnie Janoff-Bulman's Assumptive World Theory proposes that humans operate on three fundamental assumptions: the world is benevolent, the world is meaningful and predictable, and I am worthy
Meaning & Growth After LossGrief, Loss & Life Transitions
Post-traumatic growth (PTG), researched by Richard Tedeschi and Lawrence Calhoun, describes positive psychological change that emerges from the struggle with highly challenging life circumstances
Meaning & Growth After LossGrief, Loss & Life Transitions
Grief bursts (also called grief spasms or STUG reactions—Subsequent Temporary Upsurges of Grief) are sudden, intense waves of grief that strike unexpectedly, often long after the initial loss, triggered by sensory cues,…
Specific Grief PhenomenaGrief, Loss & Life Transitions
Anniversary reactions are predictable intensifications of grief, anxiety, or somatic symptoms that occur around the date of a significant loss or trauma
Specific Grief PhenomenaGrief, Loss & Life Transitions
Anticipatory grief is the grief experienced before a loss actually occurs—during a terminal diagnosis, a gradual decline, an impending layoff, or any situation where loss is foreseen but not yet realized
Specific Grief PhenomenaGrief, Loss & Life Transitions
The empty nest transition occurs when the last child leaves the parental home, fundamentally restructuring a family system that has organized around child-rearing for decades
Life TransitionsGrief, Loss & Life Transitions
Career death describes the experience when a professional identity—not just a job but an entire career trajectory—becomes unviable
Life TransitionsGrief, Loss & Life Transitions
Retirement represents one of the most significant identity transitions in modern life, particularly for knowledge workers whose professional identity is deeply intertwined with their sense of self
Life TransitionsGrief, Loss & Life Transitions
William Bridges distinguished between change (external, situational) and transition (internal, psychological), arguing that the real challenge isn't the change itself but the psychological reorientation it requires
Life TransitionsGrief, Loss & Life Transitions
Liminality, from anthropologist Victor Turner's work on ritual transitions, describes the threshold state between an old identity and a new one—you're no longer what you were but not yet what you will become
Life TransitionsGrief, Loss & Life Transitions
Loss of possibility grief describes mourning not what was but what will never be—the unlived life, the unchosen path, the future that a loss renders impossible
Specific Grief PhenomenaGrief, Loss & Life Transitions
Collective grief occurs when a community, organization, or society mourns a shared loss—a mass tragedy, a beloved public figure's death, an organizational failure, or a cultural shift that eliminates a shared way of life
Specific Grief PhenomenaHealth & Longevity
Bruce McEwen's allostatic load theory describes the cumulative physiological cost of chronic stress adaptation
Aging BiologyHealth & Longevity
The healthspan concept, popularized by Peter Attia and others, distinguishes between total years lived (lifespan) and years lived in good health (healthspan)
Aging BiologyHealth & Longevity
Dan Buettner's Blue Zones research identified five regions worldwide where people live measurably longer, healthier lives: Okinawa (Japan), Sardinia (Italy), Nicoya (Costa Rica), Ikaria (Greece), and Loma Linda, Californ…
Aging BiologyHealth & Longevity
Telomeres are protective caps on chromosome ends that shorten with each cell division, functioning as a biological aging clock
Aging BiologyHealth & Longevity
Hormesis describes a dose-response relationship where low-dose exposure to a stressor that is harmful at high doses actually produces beneficial adaptive responses
Health MechanismsHealth & Longevity
The gut microbiome—trillions of microorganisms inhabiting the digestive tract—functions as a quasi-independent organ system that profoundly influences brain function, immunity, metabolism, and mood through the gut-brain…
Health MechanismsHealth & Longevity
Sleep architecture describes the structured cycling of sleep stages throughout the night: NREM Stage 1 (light transition), NREM Stage 2 (spindle-rich consolidation), NREM Stage 3 (deep/slow-wave sleep for physical restor…
Health MechanismsHealth & Longevity
Chronic low-grade inflammation has emerged as a unifying mechanism underlying most major age-related diseases: cardiovascular disease (atherosclerosis is fundamentally an inflammatory process), cancer (inflammatory envir…
Health MechanismsHealth & Longevity
Metabolic health describes the body's ability to efficiently process energy—specifically, to maintain blood glucose, insulin, triglycerides, HDL cholesterol, blood pressure, and waist circumference within healthy ranges…
Health SystemsHealth & Longevity
The social determinants of health (SDOH) framework recognizes that clinical healthcare accounts for only 10-20% of health outcomes, while social and environmental factors—income, education, housing, food access, employme…
Health SystemsHealth & Longevity
Stephen Porges' polyvagal theory identifies three hierarchical states of the autonomic nervous system: ventral vagal (social engagement, safety, connection—rest/digest/connect), sympathetic activation (fight-or-flight mo…
Health SystemsHealth & Longevity
The 'exercise as medicine' framework treats physical activity as a pharmaceutical-grade intervention with dose-response relationships, side effect profiles, and specific mechanisms of action for different conditions
Health InterventionsHealth & Longevity
The epigenetic clock, pioneered by Steve Horvath, measures biological age through DNA methylation patterns at specific CpG sites across the genome
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