For a society to be considered “healthy” it needs to measure as achieving positive outcomes in in at least 2 broad categories:

What I refer to as Psychological well being may be divided as per the model featured here:

Social Quality: A Way to Measure the Quality of Society(https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3384781/)

Veganism potentially impacts each of the two categories, that is to say that veganism can result in

Like any diet and lifestyle choice the positive results of enjoying a vegan practice are conditional. There is no avoiding the fact that a diet of beer and potato chips is vegan and that it is highly unlikely that diet will produce positive improvements in physical health.

Society improves when the individuals that make up the society improve. Individuals behaving in a way that aligns well with a dedication to achieving positive results in the areas described above will result in a “better” society. To my thinking, there is very little risk of a vegan lifestyle working against those intentions. To the contrary, the behaviors associated with a vegan lifestyle align well with better physical and psychological health. My conclusion therefore is that society is* *healthier *with an increase* is veganism and conversely society *is less healthy* when adherence to a vegan lifestyle is diminished.

Importantly, veganism is not necessary for a healthier society. There is no evidence that a vegan lifestyle is the only lifestyle that will result in better physical and psychological health. Veganism is however a simple, convenient, and effective way to achieve those outcomes.

Thank you again for the question. Health and happiness to you always.