“...all six members of the group have had cancer, with four dying of it.”
Ok how old are these guys? If in their 30s in 1957 they gotta be in their late 80s or 90s today. If that is accurate then someone has to explain their longevity.
All men after the age of 70 have "cancer". Our prostate gland has a timer and most start having signs of cells with nuclear anaplasia. The advances in cardiology and smoking cessation pushed life expectancies for men out of the 60 decade and into the 70 and 80 decades. We all die of something so instead of buying it at age 65 from a "coronary" we go from these slow growing cancers of the prostate and when that gets treated successfully it will be something else.