While you aren't wrong in your initial population density idea, this more has to do with the value of land in densely populated areas than actual density itself. (politics.stackexchange.com)
PE ratios have nothing to do with value investing, a value investing strategy could mean buying or selling stocks with high and / or low PE ratios. (money.stackexchange.com)
I no longer care whether other people think of me as a healthy eater, because I've realized that what I eat has nothing to do with my value as a human being. (mindbodygreen.com)