The correct answer is "informal social ties."
With that statement, Sociologist Robert Putnam was referring to informal social ties and how these promote bureaucracy.
Robert Putnam is a Professor of Harvard University in Cambridge, Massachusetts. He analyses the society of the US, observing how it has deteriorated civic and personal values. He wrote the book "Bowling Alone: The Collapse and Revival of American Community," in which he suggests that new forms of social engagement must be developed to change the situation.
Economically, both the Maya and Aztecs were farmers. They farmed a variety of produce which included corn, squash and beans. ... The Aztecs and Mayans were two Mesoamerican civilizations that had much in common. One similar characteristic had to do with agriculture.
