This is a very interesting post, Harold.
I think it's definitely a both-and, human hearts and structures. No structure is immune from humanity's lust for power or our longing for freedom from the influence of certain 'others'. Lust for power over others & desire for absolute freedom from the influence of others are just gross distortions of our capacity to influence one another and our ethical autonomy. Unless we cease to be human, there is no utopian structure, planned or emergent (not that you're expecting a utopian structure). And I suspect the very structure that might be best for collaborative, purposeful, scalable endeavour, may be the most vulnerable to our evil.

But I may go and contradict myself here in that I think there is a way of thinking and "structuring" human institutions that holds promise for the future of humanity, and that is one rooted in relationships (duh! I know!). We firstly need to recognize the fundamental truth that human flourishing lies in the quality of our relationships - individual, family, neighborhood/tribe, organization, nation, globe. Only in the context of those different relationships can we appreciate the best expressions & constraints of power and freedom. Then we need to consciously rethink all that we do, and how we do it, through that lens. Big, economically efficient, environmental sound prison accessible to 6 major cities? What's the impact on relationships with spouses, children, friends because it's so far from them and it's too expensive to stay nearby? Shareholders & Directors - what responsibilities do they have to relationships of a company with all its stakeholders (vendors, customers, employees (& their families), neighborhood etc,)? Criminal justice - what does the almost exclusive focus on punishment do for the relational impact of crime? Impact of working hours & methods on families?

I'm associated with a non-profit in the UK that has been working with this thinking for years, building on a model of Relational Proximity (communication, time, knowledge, power & purpose) that has great analytical, explanatory & instructive power. Your post convinces me it's time for this to bear fruit.