UberKuh

"Do you think differences in aggressive tendencies between the sexes are mostly genetic of environmental? Based on this study, it appears to be the latter, but could you argue otherwise?"

I would say mostly environment, but genetics could play some role. It's always hard to tell-- genetics and environment always work together, so figuring out which is most influential can be tough. I'm always skeptical when studies claim to show some essentialist gender difference -- I'm glad that the authors of this study didn't jump to unjustified conclusions. I'm troubled though by the last sentence.

"This investigation would seem to indicate there is a predominant role for men in maintaining justice and issuing punishment."

What the study showed is that the men liked to see the people they didn't like physically punished -- not exactly justice, if you ask me.

"Do you agree that physical attractiveness is an unconscious advantage for those who have it? Is it possible that something associated with attractiveness, but which is distinct from it, like fashion or body type, might be more responsible for causing a favorable outcome for the attractive person?"

No, I think its attractiveness (body type and fashion would be components of it, I think). Though I think it depends on context -- just anecdotally, I would think the more superficial the interaction, the more influence attractiveness plays.

- How subjective is physical attractiveness? Is it mostly objective, as this and other recent studies seem to indicate, or is it mostly subjective, a matter of personal opinion?

I think on a group level, there are definite objective tendencies, but on an individual level, a wide range of subjectivity exists. I don't think there's any absolute objective scale of attractiveness.