The present day anti-tobacco campaign in Germany has been unable to exceed the seriousness of the Nazi-era climax in the years 1939 â `` 41 and German tobacco health research at the end of the 20th century is described by Robert N. Proctor as `` muted '' . At the end of the 20th century , the anti-tobacco campaign in Germany was unable to exceed the seriousness of the Nazi-era climax in the years 1939 â `` 41 and German tobacco health research was described by Robert N. Proctor as `` muted '' .