By Janet Sheridan, Special to The Denver Post Last Presidents Day, I found myself thinking about the contentious muddle in which our nation is currently mired; I worried that we’ll never find our way out of it. My concern dampened the joy I usually find in breakfast; but I comforted myself by remembering that we survived the ’60s. A high school junior, busy with school, friends, and part-time jobs, I saw the United States as a pleasant, mostly peaceful place in 1960.