In collaborative power, we decide together. We don't defer or outsource responsibility for our wellbeing and success to centralized commanders or committees. We share it. This is more and more possible in this era of having simple, realistic models for collaborative decision making. These didn't exist in the past days of dictators and executives and so even when centralized power didn't work, it was the only viable option we had.
The advantage is that more resources are engaged and we are able to be smarter together than even the most wealthy and educated among us.