What effects can individuals being too proud of material possessions have on society?

I'd say when people focus too much on material possessions, it creates unnecessary social pressure. The main issue is that it shifts people's values towards superficial comparisons rather than meaningful relationships. For example, in Shanghai, I've noticed how some parents judge schools based on how many luxury cars are parked outside during pickup time, rather than the actual education quality. That said, I don't think owning nice things is bad - it's when people use possessions to measure personal worth that problems arise. What matters more is whether people maintain real connections beyond just showing off their latest purchases.