We all know this, but this might be a good article to share with friends and relatives, it's two years old, but I hadn't seen it before.
TLDR: University of Adelaide (in Australia) scientists examined meat eating in cultures world wide, and found that more meat correlates with longer life.
They point out that previous research efforts indicating meat causes bad health are badly designed and suspect on the face of them, but even more suspect with this study
Even they say that meat is not necessary and can be substituted:
“Studies looking into the diets of wealthy, highly educated communities, are looking at people who have the purchasing power and the knowledge to select plant-based diets that access the full nutrients normally contained in meat. Essentially, they have replaced meat with all the same nutrition meat provides.”
I totally thank my mother for feeding me brain as a baby and meat throughout my childhood. I'm in the 95th percentile for height and think I'm better able to learn than many in my career