You made a good point. Age-related cancer seems to result from human living condition. However, the cancer with evolution potential is expected to occur before the reproduction age. A long latency may not be desirable from God's point of view because it misses the critical reproductive activity of the evolving population.
【在 h*******o 的大作中提到】 : In my opinion, that was not the case of evolution in the past as most of : our ancestors wouldn't live that long to develop cancer.
n*b
8 楼
Another good point here. Environmental carcinogenesis has significant contributions to the age-related cancer. Changes in life style affect the level of estrogen that has a direct implication in breast cancers. BRAC1/2 are an example of evolving heritable changes for milk production. When seeded in the population, BRAC1/2 or like mutations may be useful in the event of either a failure in learning how to use animal milk as a safe substitute or a need for the breeder/feeder when natural substitutes are not enough.