Ferguson was predicted in the '60s (and before...)

Remember the Milgram Experiment?
As a recap,

If a person in a position of authority ordered you to deliver a 400-volt electrical shock to another person, would you follow orders? Most people would answer this question with an adamant no, but Yale University psychologist Stanley Milgram conducted a series of obedience experiments during the 1960s that demonstrated surprising results. These experiments offer a powerful and disturbing look into the power of authority and obedience.

Now look at the reasons for the high levels of obedience, and after each bullet point, add the phrase "In Ferguson, the officers were Law Enforcement, believe that their superiors know what they are doing, and believe that they are acting in a good cause"

• The physical presence of an authority figure dramatically increased compliance.
• The fact that the study was sponsored by Yale (a trusted and authoritative academic institution) led many participants to believe that the experiment must be safe.
• Participants assumed that the experimenter was a competent
• expert.
• The shocks were said to be painful, not dangerous.

Mind you, this doesn't even begin to get into bad faith, race relations, etc.  The Milgram experiment basically pointed out that, even assuming the most charitable reasons, something like Ferguson was bound to happen.
Militarizing the police is not a solution, it is only exacerbating the problem.

"Ordinary people, simply doing their jobs, and without any particular hostility on their part, can become agents in a terrible destructive process. Moreover, even when the destructive effects of their work become patently clear, and they are asked to carry out actions incompatible with fundamental standards of morality, relatively few people have the resources needed to resist authority" (Milgram, 1974).