The Siblinghood Theory
Created by therapist and author Minaa B., The Siblinghood Theory is a relational framework for understanding how sibling and peer relationships shape how we navigate belonging, conflict, and connection throughout life.
Unlike traditional therapeutic approaches that focus on parent-child relationships, The Siblinghood Theory examines horizontal relationships—those between equals—as fundamental to how we build and maintain relationships. Drawing on attachment theory, family systems, and individual psychology, the framework synthesizes decades of research into a practical lens for understanding sibling and peer dynamics.
Horizontal vs. Vertical Relationships
Most of what we know about human development comes from studying vertical relationships shaped by authority, such as parent-child relationships, which teach us about safety, structure, and how to respond to power.
But much of our relational experience happens horizontally, among siblings, friends, classmates, coworkers, partners, and neighbors. These relationships teach us how to share, compete, repair, and belong alongside one another.
Through six dimensions, The Siblinghood Theory explores what birth order theory leaves out: how power, culture, gender roles, and systems shape not only personality, but also the bonds we build with our siblings and peers.
Chosen Siblinghood: Navigating Peer Bonds
The Siblinghood Theory recognizes that formative peer relationships aren't limited to biological siblings. Close cousins, family friends, childhood companions, and other peers can shape identity development, self-esteem, and how people navigate belonging, connection, and community.
This means The Siblinghood Theory applies to everyone, including people who grew up as only children. It examines what shapes our sense of belonging through the systems and relationships we have with others, and how those interactions teach us to compete, belong, navigate conflict, and feel connected to others.
The Siblinghood Theory explores how we navigate belonging, conflict, and connection throughout life, and the cultural and social systems that shape them. Minaa shares the full framework in talks and workshops for clinicians, universities, and organizations working to ease loneliness, strengthen belonging, and build lasting relationships and community.