Last Saturday marked my 20th anniversary at the National Trust for Historic Preservation. For the past few days, I’ve been thinking about hope in the context of life’s milestones.  Not a greeting card kind of hope or optimism, but “hope that’s kind of gritty…the kind,” as described by songwriter and author Carrie Newcomer, “that gets up every morning and chooses to try to make the world just a little kinder (or better) in your own way.” The thought that “hope is grounded in memory” has influenced the work of  another writer I admire, Rebecca Solnit. In a recent interview, she notes that “We think of hope as looking forward, but…(if) you study history deeply, you realize that, to quote Patti Smith, ‘people have the power’….(P)eople have often taken on things that seemed hopeless — freeing the slaves, getting women the vote — and achieved those things.”  Knowing history gives me hope. To be fair, hope is hard.  Cynicism – where I have gone on occasion – is easy. But in thinking about 20 years of …