http://mentalhealthdaily.com/2013/04/24/11-ways-to-increase-your-iq-score-intelligence-quotient/
https://www.psychologytoday.com/blog/the-scientific-fundamentalist/201005/why-vegetarians-are-more-intelligent-meat-eaters
I really had to think about this thread because I understand that Off topic is filled with extremely intolerant people especially republicans.
...but putting that aside, I'm going to post my opinion on veganism.
First of all, veganism signifies not consuming any animal and/or animal byproduct. The reason why veganism shouldn't be an option, and the whole American populous should become vegan is for the sole purpose of being healthy, more aware of the food consumed, and stop animal deaths. Yes, meat should be banned from the states.
Before you go bashing me, remember that there is a positive correlation with veganism and intelligence. Not only will the U.S. be more intelligent, but animal farms would be banned, no more animal deaths, the average American would lose more weight, and we can come up with state of the art technology to increase crop yield organically and sustainably. This would be a huge step for human progress, and this would make the U.S. more intelligent.
[spoiler]But that's only IF you repubtards allow the government to ban meats, so we can progress as a whole.[/spoiler]
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Correlation does not equal causation. Just because some people who were vegans were smarter than some others who weren't does not mean vegans are smarter. If person A eats an apple while person B doesn't. Person A later gets cancer. Do apples cause cancer? No they don't. That just correlation, not causation.