Regarding aggression, we know that ideas are capable of causing aggression. I don't think this is in dispute: it is a possible cause. But we don't know that chemicals can do it, in humans. No one has suggested a mechanism by which they could.
I also don't agree that emotions are a separate thing from intelligence, which sometimes bypasses or overcomes it. I think that emotions are labels for (not amazingly good) ways of thinking -- they, like personality generally, are a part of ones ideas. In this case too, I submit that there is no coherent explanation for how they could be anything else.
However, we DO know chemicals can in humans. Pot and ecs reduce aggression, while meth increase it. I don't know if particular mechanisms are understood, I'm not a biochemist. But empirical observations do show that chemicals (in some way) affect aggression (and other emotions).
As for ideas, we don't know the mechanism there either. In fact, we understand the mechanisms of thought less than those of emotion. I can predictably make you and other humans I don't know happy or sad with chemicals; I can't do the same with ideas.
Being able to make people happy with chemicals is consistent with emotions being purely ideas. It just takes a subconscious idea to interpret certain sensations, caused by the chemical, in a positive way. And for this idea to be shared by most people in our culture.
Timing and randomization shows that chemicals are the cause. Double blind experiments must have been done at some point, which would show the effect is causative.
As for drug effects being cultural, I disagree. Amphetamines also cause aggression in rats, for instance:
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Double blind experiments (with controls, randomization, etc) do not show causation, they show correlation. You need to have an explanation of what the cause is, or that kind of study doesn't get you anywhere. Because without an explanation, you don't even know what you should be looking for, or have any idea why that correlation exists.
BTW, if you know of a reputable, scientifically-oriented source which believes that double blind experiments demonstrate causation in the absence of an explanation, not just demonstrate correlation, I'd like to see it.
Double blind experiments do show causation (ignoring metaphysical discussions).
There are 3 possibilities: Chemical -> Behavior, Behavior -> Chemical, or ??? -> (Chemical and behavior).
A randomized trial eliminates the latter two possibilities (since chemical is correlated only to a coin flip). Double blind eliminates experimenter bias.
Then, it could be that the chemical somehow causes happiness. Or it could be that the chemical causes memories of one's children, and everyone in the study has happy memories of their children.
So, the causation is still in doubt. Many explanations are consistent with the observed data.
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Yes I am proposing that chemicals correlate with "aggression" in humans and rats for different reasons. But I don't accept that the thing called "aggression" is the same thing in humans, and in rats. To help illustrate why not, consider aggressive behavior by video game characters. Same word, but not the same phenomenon -- in that case, no emotion is present, and the cause is some C code.
I'm not opposed to it either (1). I guess I'm assuming you live on the coast; if you do, it's very surprising if you know multiple people who favored the war.
Regardless, my point is that many women make an emotional decision to support Hillary. They then come up with rational sounding reasons after the fact.
In any case, the point is that we know for certain that chemicals in the brain influence emotion and decision making (e.g., Ritalin). And the silliness/irrationality described on overcoming bias is mostly emotion defeating reason.
Regarding aggression specifically, we know that males are more aggressive both in humans and other mammals. Why do you suspect a non-chemical cause in humans, and a chemical one in other mammals?
>To reasonably be so certain I haven't had a girlfriend, you must think I am quite young. What about my writing style makes you think I am young?
I have no idea what your age is. I've never met a person who has had a seriously relationship and also believes women don't make extremely emotional decisions.
(1) I think freeing Kurdistan was sufficient justification, just as freeing Kuwait was sufficient justification for Iraq 1. At this point, I favor either ending it immediately or doing it right (split the country into small pieces, let them merge together if they want).