I'm genuinely interested in this topic. I'm not saying that vegan diet is the best diet out there, but what I've read so far it really seems to be a much healthier alternative than the "western default".
Some interesting studies about vegan diet and it's impact on health:
All these studies contain findings that support the idea of vegan diet being one of the healthiest option: vegans tend to have lower BMI, blood pressure and reduced (prostate) cancer rate.