The third rampage of evolutionism: evolutionary pscyhology

i'm not too sure what evolutionary psychology exactly states or suggests (probably cause my psych teacher is too obsessed with maslow) but i've found that people do not act entirely for themselves.
this i've seen from experience, we tend to group together, so most of these crimes will happen with multiple people (in my oppinion) because i see no clear evolutionary advantage for acting alone and being overly violent.
if people who do belive in evo-psyc do end up becoming like that then it is because they belive in annotehr part of evo-psyc.
inno if i'm all wrong about it because all my pscy teacher said is evo-psycologists belie in is food, sex, and sleep... wich i belive is incorrect because lots of stuff is missing from that description.

i'm not being deluded by maslow, in truth i keep finding flaws in it because i'm criticaly thinking... but then the teacher doesn't like my argumenmts.
but i should get on topic.i have herd about in some areas in europe like switzerland were people are so trusting that the bar keeper will leave the bar to sleep and let the customers serve themselves and pay for the drinks... this shows that we can have trusting relations with complete strangers. what is the evolutionary benifit of that?
i think that is to show that you trust others that they won't steal from you. also this goes into having guilt... why would we have guilt...i think i'm gettin off topic a bit here will post new topic on evolutionaryadvantage for having guilt.Yes food sex and sleep are major parts of what we do... but there are things like relationships bettween others of the same gender (friends, comrades, neigbours, etc)... there are more.ummm now i just forgot the entire point of this topic... i'm not to sure what exactly we are debating.

my grandpa usses that exuse about smocking cause his father lived till he was 80... then he died from something to do with the lungs so they said it was the coal mines.but annyway. i have started a new thread called "evolutionary advantage of guilt"and currently i'm only 17 so i lack the highschool education to go into colledges and universities.but back to ontopicness:
you make a valid point about what evo-psyc studies or tries to explain... so what i seem to understand from your post is that some people either do not understand completely what evo-psyc is or you didn't understand their post... and of course i didn't understand your reply... i'll just go back to replying to what i can comprihend