I've searched everywhere before asking this question but I couldn't find an answer to my specific question:
"In spite of all the problems in life—lack of education, poverty, unemployment— John always thinks that his own problems are bigger.
I've just made this sentence so I know it's kinda choppy and misleading. I want to know if the use of em dash here is correct and do I have to put " and " before the last option in the list, which is "unemployment"?