Washington Post: Thanksgiving nicely focused our attention on things of lasting importance: family, friends, community, a rich harvest. None of these blessings comes without cost or sacrifice. We should consider what we must give of ourselves to preserve such abundance in the face of increasing climatic instability. One needn’t ponder this question in a vacuum. Several best-sellers offer advice about what we must ask of ourselves and one another. Their titles suggest that we needn’t break much of a …