If you're like most people in the United States, you have a vague awareness that the U.S. military keeps lots of troops permanently stationed on foreign bases around the world. But have you ever wondered and really investigated to find out how many, and where exactly, and at what cost, and to what purpose, and in terms of what relationship with the host nations?

A wonderfully researched new book, six years in the works, answers these questions in a manner you'll find engaging whether you've ever asked them or not. It's called Base Nation: How U.S. Military Bases Harm America and the World, by David Vine.

Some 800 bases with hundreds of thousands of troops in some 70 nations, plus all kinds of other "trainers" and "non-permanent" exercises that last indefinitely, maintain an ongoing U.S. military presence around the world for a price tag of at least $100 billion a year.

Why they do this is a harder question to answer.

Yes, I also want to say Free Mumia. In fact, I want to say Free all the prisoners. Turn the prison holding Mumia Abu-Jamal into a school and make him dean. And if you won't free all the prisoners, free one who has been punished to a level that ought to satisfy any retributive scheme for any crime he might have committed. And if you won't do that, free him because he was put into prison by a fraudulent and corrupt trial that hid as much evidence as it revealed, and fabricated the latter.

More importantly, Read Mumia. His new book is called Writing on the Wall: Selected Prison Writings of Mumia Abu-Jamal, and it includes commentaries by Mumia from 1982 through 2014. Mumia went ahead and made his prison a school -- a school in history, in politics, and in morality. And his own moral teaching is primarily by example. He teaches the liberating lesson that, if you so choose, you can know right now that never ever will anyone be able to beat you down. You can be cheerful for the rest of your life and rest completely assured that nothing can ever take that away.

If you ever doubt the importance of good fathering, see Amy.

The documentary is about the sad life of Amy Winehouse (1983-2011), a British singer-songwriter whose name was almost synonymous with “self-destructive genius.” By her own account, she blamed some of her worst tendencies on her father’s failure to be there for her—or her mother, to whom he was unfaithful—when Amy was growing up. Her parents separated when she was only 9.

Of course, good mothering can make up for a father’s absence, but Amy clearly didn’t get that, either. Late in the film, her mother reveals that she learned Amy was bulimic when the girl was 15. So how did Mom respond? Apparently, she didn’t.

Back to the father: As if to make up for his earlier absence, Mitch Winehouse did play a role in Amy’s adult life, but it’s debatable whether he played a good role. At one point, he argued against getting his alcohol- and drug-addicted daughter the rehab treatment she so obviously needed. Later, he seemed more interested in benefiting from her celebrity than in doing what was good for her health and well-being.