The transference research established earlier in this series documented how parental relationship templates are automatically applied to investors and authority figures. The same mechanism operates for sibling relationships — and the structural features that activate it are present in co-founder dynamics, team hierarchies, and board relationships with enough specificity to produce recognisable and predictable patterns. The sibling template does not arrive with a label. It arrives as a strong intuition about how the co-founder should behave, an unexplained irritation with a team member’s approach, or an implicit competition for the investor’s endorsement that neither co-founder has consciously initiated.

How co-founder relationships activate the sibling template

Freud’s transference concept predicts that relational templates from formative relationships generalise to new relationships with similar structural features. Sibling relationships share specific features with co-founder dynamics: peer or near-peer status, shared resources and shared stakes in a common goal, and a simultaneous relationship with common external authority figures whose evaluation and approval matter to both. When a co-founder relationship has all of these features — which it typically does — it activates the sibling relational template automatically.

The co-founder who is a firstborn sibling brings the authority-maintenance, responsibility-oriented, conscientious template to the relationship. The laterborn co-founder brings the creative, collaborative, challenge-the-established-order template. Neither is relating purely to the co-founder as co-founder. Each is partly relating to the co-founder through the lens of the sibling whose structural position the co-founder’s role resembles. The strategic disagreements that result are genuinely about strategy — and partly about something else that neither party has identified.

The investor as the shared parent whose approval both co-founders are seeking

Dunn and Plomin’s (1990) research on sibling dynamics established that competition for parental approval is one of the most enduring features of sibling relationships — producing the differential treatment perceptions, coalition formations, and approval-seeking strategies that characterise the sibling system even into adulthood.

In the co-founding team, the investor occupies the structural position of the shared authority figure whose resources and approval both parties depend on. The competition for parental approval is re-enacted: each co-founder implicitly seeks to be the investor’s preferred voice, the one whose strategic vision the investor endorses, the one the investor calls first when a significant decision requires input. This competition is typically invisible to both the co-founders and the investor. The board meeting that becomes a subtle performance competition between co-founders for the board’s endorsement is the sibling approval-seeking dynamic in a venture-capital context — operating through the structural similarity of the investor-as-shared-authority-figure without anyone having explicitly activated it.

How team coalitions mirror family alliance patterns

The birth order research and the group dynamics literature together predict that team coalitions form along lines that mirror family-of-origin alliance patterns — particularly under pressure or resource competition. The firstborn-oriented team members coalesce around authority maintenance, established procedure, and the systematic implementation that their family niche trained. The laterborn-oriented members coalesce around challenging the status quo, advocating for novel approaches, and the creative disruption that their family niche required.

The team hierarchy that results is partly an expression of genuine strategic disagreement and partly the sibling coalition dynamic playing out through the team’s professional structure. The conflict between the execution-focused senior team members and the innovation-focused newer ones may be accurately understood as a strategic tension — and simultaneously as the firstborn-laterborn coalition pattern expressing itself through the organisational context.

The projection process and the roles that travel with people

Bowen’s family projection process describes how families project unresolved emotional content onto specific family members, producing the scapegoated child who carries the family’s anxiety and failure projections, and the golden child who carries its aspirations. These role assignments do not stay in the family. They travel with the person into professional contexts where the structural conditions of shared high-stakes work and shared authority figures re-activate the projection dynamic.

The team member who was the family scapegoat tends to be unconsciously positioned, in high-pressure team contexts, as the person who carries the team’s failure anxiety — the one blamed when things go wrong, the one whose contributions are underweighted in team discussions, the one who cannot seem to escape a reputation that does not reflect their actual performance. The golden child tends to carry the team’s success aspirations — overweighted, over-trusted, and eventually overwhelmed by expectations that exceed their capacity.

Neither assignment is made deliberately. Both are the family projection process re-enacted through the structural similarity of the team.

The parentified co-founder who carries everyone

Boszormenyi-Nagy and Spark’s (1973) parentification research documented that the child who learns to manage their parent’s emotional wellbeing develops an orientation toward others’ emotional needs that is both deeply ingrained and exhausting in adult professional contexts. The parentified entrepreneur brings this orientation to the co-founder relationship and the team: they take on the emotional regulation of the co-founder, the anxiety management of the team, the investor relationship maintenance, and the customer experience simultaneously — while consistently neglecting their own emotional needs in service of managing everyone else’s.

The parentified co-founder looks, from the outside, like an unusually selfless and emotionally attentive leader. The internal experience is exhaustion and a diffuse resentment at the asymmetry that the role produces — one that they cannot easily name because naming it requires acknowledging that they were never offered the alternative.

What the differentiation framework predicts for team performance

The Bowen family systems framework predicts that team performance depends on differentiation — the capacity of team members to maintain their own perspectives and values while remaining genuinely engaged with shared team goals. Teams with higher differentiation show more effective conflict resolution, better strategic analysis, and more resilient recovery from setbacks than teams where fusion dominates — where members’ individual positions collapse under the emotional pressure of the team’s shared anxiety.

The practical implication is that the co-founder pair or founding team that develops the capacity to hold genuine strategic disagreement without either fusing into false consensus or cutting off into hostile distance is replicating at the professional level exactly the differentiation achievement that Bowen describes as psychological health at the family level. The sibling dynamics that produced fusion or cut-off in the family of origin will tend to be reproduced in the co-founder relationship unless the differentiation capacity is explicitly developed.

Books worth reading on this

The Family Crucible by Augustus Napier and Carl Whitaker is the most accessible account of family systems dynamics available — covering the projection process, coalition formation, role assignment, and the triangulation mechanisms that this article applies to co-founder and team contexts. Written as a narrative account of a single family’s therapy, it makes the abstract family systems concepts experiential in a way that more theoretical texts do not. For the entrepreneur who wants to understand why their team dynamics feel inexplicably like a family dynamic, this book provides the conceptual framework in its most readable form.

If the dynamics described here are significantly affecting your wellbeing, speaking with a psychologist is the right next step. UK: Samaritans (116 123, free, 24/7). Mind (0300 123 3393). BACP: bacp.co.uk/search/Therapists. Crisis Text Line — text HOME to 741741 (US, UK, Canada, Ireland). International: internationaltherapistdirectory.com.

This article is for educational and informational purposes only. Sources: Freud, S. (1912), The Dynamics of Transference, in Strachey, J. (trans. and ed.), The Standard Edition of the Complete Psychological Works of Sigmund Freud, Vol. 12, Hogarth Press. Sulloway, F.J. (1996), Born to Rebel: Birth Order, Family Dynamics and Creative Lives, Pantheon Books. Dunn, J. & Plomin, R. (1990), Separate Lives: Why Siblings Are So Different, Basic Books. Kerr, M.E. & Bowen, M. (1988), Family Evaluation, W.W. Norton. Boszormenyi-Nagy, I. & Spark, G.M. (1973), Invisible Loyalties: Reciprocity in Intergenerational Family Therapy, Harper & Row. Napier, A.Y. & Whitaker, C. (1978), The Family Crucible, Harper & Row.