This week’s newsletter it’s a really important a facet of leadership that rarely discussed in tactical business advice: how unaddressed negative psychological traits - ours or others’ - can erode collaboration, decision-making, and emotional stability in high-pressure environments like startups.
According to behavioral researchers, the average adult has approximately 16 meaningful social interactions per day. For a founder, that number often doubles. We negotiate, pitch, delegate, manage, soothe, and align - constantly switching contexts between people with varying emotional states, motivations, and personality structures.
In that fast-moving web of human interaction, it’s not uncommon to encounter individuals with traits consistent with Cluster B personality disorders - particularly narcissistic or borderline patterns. These individuals may not have formal diagnoses, but the behavioural patterns (such as gaslighting, blame-shifting, or chronic invalidation) can be psychologically destabilising.
Understanding emotional maturity in this context goes beyond setting personal boundaries. It involves recognising the early signs of manipulative or dysregulated behaviour in others, regulating our own internal response, and adapting our communication strategy to minimise harm - both to ourselves and to team dynamics.
But emotional hygiene also requires introspection. Founders under chronic stress are vulnerable to replicating behaviours rooted in unprocessed trauma - whether it’s perfectionism, defensiveness, or control masked as care. These aren’t flaws of character, but echoes of unmet needs. Recognising and interrupting these internal patterns is critical to building emotionally sustainable leadership.
In this issue, we’ll unpack:
– The behavioural signals of gaslighting and narcissistic communication in startup settings
– What happens to your brain under manipulative stress
– And how to strengthen your psychological boundaries without becoming rigid or reactive
Let’s begin.
In high-stakes, fast-paced environments, narcissistic traits can masquerade as charisma or confidence. The early signs are often subtle: grandiosity masked as visionary thinking, lack of empathy reframed as “tough decisions,” or manipulation dressed in strategic delegation.