I didn't do anything but I see that you have a small upvote on this comment already too :) They are supporting engagement on Steemit and there are many people on their list (from what I understand). You can read Asher's post about it https://steemit.com/steem/@abh12345/faith-in-commentary. There are many comments to this topic.

I think it's the latter..pollution, industry, pesticide and other stuff that we're eating, no exercises (in many cases), lots of worries and so on. I grew up in a poor family. We never had a lot and sometimes not even enough. But we had our fields and we went there everyday to take care of our vegetables and fruits. We didn't use any chemicals and there was no reason to do so as all these pests didn't exist at that time. My great grandmother and grandfather lived to 85. They didn't die because they were sick but because they worked so much. This was how it worked in the past..

Nowadays we have so much that we forget to do basic stuff. We forget to move and live healthy. We keep buying what we don't need and eat too much. We are exposed to pollution that didn't exist before and I think that getting sick is just the last step in our unhealthy lives. This is of course not valid for everyone. There are cases like your dad that we will just never understand how it is possible that they got sick leading such a healthy lifestyle..