I was inspired to read about unsung American heroes like Rosanell Eaton in Jim Rutenberg’s ‘‘A Dream Undone: Inside the 50-year campaign to roll back the Voting Rights Act.’’

‘‘We the People of the United States, in Order to form a more perfect Union. ...’’ It’s a cruel irony that the words that set our democracy in motion were used as part of the so-called literacy test designed to deny Rosanell and so many other African-Americans the right to vote. Yet more than 70 years ago, as she defiantly delivered the Preamble to our Constitution, Rosanell also reaffirmed its fundamental truth. What makes our country great is not that we are perfect, but that with time, courage and effort, we can become more perfect. What makes America special is our capacity to change.

Nearly three decades after Rosanell testified to her unbroken faith in this country, that faith was vindicated. The Voting Rights Act put an end to literacy tests and other forms of discrimination, helping to close the gap between our promise that all of us are created equal and our long history of denying some of us the right to vote. The impact was immediate, and profound — the percentage of African-Americans registered to vote skyrocketed in the years after the Voting Rights Act was passed.

But as Rutenberg chronicles, from the moment the ink was dry on the Voting Rights Act, there has been a concentrated effort to undermine this historic law and turn back the clock on its progress. His article puts the recent push to restrict Americans’ voting rights in its proper context. These efforts are not a sign that we have moved past the shameful history that led to the Voting Rights Act.