Public servant Neil Collishaw devoted his life to clearing the air of cigarette smoke

In the 1980s, Mary Ann Collishaw, age 8, was on a walk with her father in Ottawa when the pair spotted a huge billboard promoting cigarettes. Her father, anti-tobacco advocate Neil Collishaw, pointed to it and predicted, “One day half of that sign will be a warning against smoking. And one day there will be no more tobacco ads.”At the time, Mr. Collishaw was a public health policy analyst whose battle against Big Tobacco had acquainted him with the industry’s ability to dodge and weave around government controls. But it was consistent with his optimism and determination that he foresaw the eventual end of tobacco marketing – and a major reduction in the number of smokers around the world.