Look, we're all materialistic. If you say your not, your a liar. We all want security. Materialism ( in my opinion) doesn't go back decades but back to when we lived in caves. We were always jealous of what the other one had. Your cave was bigger than mine and I wanted it. You had two coconuts to eat and I had one, and I wanted it. You had two pineapples to eat and I had one, and I wanted it. You don't think when Buk was sleeping on a park bench he would have preffered his own house and car? You bet he did. The problem is when people own five houses and five cars. Then your just a prick.
materialism probably was around to some extent way back when, but the accumulation of "stuff" didn't really kick in until about 10,000 years ago when we started domesticating plants and animals and became more sedentary so we could tend to said crops and animals. before that, we were more nomadic hunter/gatherers, moving around every few months, and accumulating stuff would only slow you down. their egalitarian lifestyle was slowly transformed into the materialistic, stratified world we live in today. yay agriculture!