[tsoukase]

I believe the single common caiae of increase for all types of cancer is immunosuppression. Immune system might clear a cancer cell that would otherwise evolve to fulminant disease, every few days. A slight immunosuppression might explain a astonishing increase. All the environmental factors referred are candidates for that but the most important is chronic psychological stress, which is rampant in modern adults and not measured, so not studied, in research.

[wasabi991011]

This doesn't sound right to me.

I've heard people speculate about the opposite actually: psychological stress causing the an overactive immune system, resulting in chronic inflammation and a prevalence of auto-immune disease.

I'm a layman though, would like for someone to clarify.

[tsoukase]

You probably refer to the psycho-immunology, a different aspect. I refer to onco-immunology which is even less explored. In the past many proposed a connection between stress and cancer but without evidence and ground. I think it's time to approach it with enough scientific rigor.

[Daishiman]

Immunosuppresion is not a global epidemic. If anything it is the complete opposite; an excess of inflammation, which is directly correlated with all-cause mortality, organ failure and heart disease.