What truly makes a culture and does cultural dissemination and appropriation do more harm than good?

According to this article from Pointless Banter, Generation Y has NO CULTURE! Can you believe this? The outrage! Who does this “Kevin” guy think he is anyway?? Of course we have culture! Right? I mean, we’ve left a footprint on society, right? I mean, just because I can’t really think of anything we’ve left behind yet, doesn’t mean we haven’t… right?