High care with no spine makes a friend. High spine with no care makes a dictator. You need both.
A leadership grid used widely in coaching; the backbone-and-heart framing is most associated with Mary Beth O'Neill.
Two axes — how much you care about people, and how much you hold the line. Four kinds of manager, and only one of them works.
Low heart, low backbone — the pushover. Apathy, ineffectiveness, distraction, confusion, no buy-in. Nobody knows what is expected and nobody minds.
High heart, low backbone — the friend. Poor engagement, lack of clarity, complacency, sympathy without action, inefficiency. Everyone likes them and nothing improves. This is where most well-meaning small-business owners sit.
Low heart, high backbone — the dictator. 'My way or the highway.' Performance management and corrective action, poor culture, distrust, disengagement and eventually revolt. It gets short-term compliance and loses the good people.
High heart, high backbone — the motivator. Clarity, trust, stretch and performance, high engagement, empowerment. Demanding and supportive at the same time.
The two are not a trade-off. The friend and the dictator both believe they are, which is why each thinks the other is the problem.
Compare with Blake and Mouton's managerial grid, which uses concern for people against concern for production.