This all goes back to what my mom says all the time: "it's a me-me world", meaning the majority of people are only concerned about themselves, not anyone else.

This theory explains why people can let people lie on the floor in the ER and not do anything, why people try to run you over while driving with their cell phones, why your neighbor kid, and parents, think it's ok for the child to use your yard as an extension of their own, why people use their baby strollers in the mall as battering rams so they can get to the stores faster. It explains a whole lot of things. It is a sad state of our social world today.