1. Can methyl groups affect genes that help with cognition, intelligence, etc

Can methyl groups affect genes that help with cognition, intelligence, etc. ? If so what are the ramifications?What impact does epigenesis have on socio-economic problems, such as welfare, mental health?Are poor people disadvantaged because they aren’t smart enough, or because they are poor and don’t get the right number of methyl groups to turn off or on enough brain neurons, they lack abilities to compete and succeed?What impact do trauma and war experiences have on grandchildren?

1.Can methyl groups affect genes that help with cognition, intelligence, etc

Question
Can methyl groups affect genes that help with cognition, intelligence, etc.? If so what are the ramifications?
What impact does epigenesis have on socio-economic problems, such as welfare, mental health?
Are poor people disadvantaged because they aren’t smart enough, or because they are poor and don’t get the right number of methyl groups to turn off or on enough brain neurons, they lack abilities to compete and succeed?
What impact do trauma and war experiences have on grandchildren?