Consumerism is a social and economic order that encourages the purchase of goods and services in ever-greater amounts. In the 21st century this is especially true when lessons like "only look out for #1" are being taught. People consume, consume and consume while rarely or not giving back at all.
An example is in the case of water. We need fresh water, we consume ever larger amounts of it. Yet we don't give back to the Earth because many people pollute water sources. There's only 1 habitable planet, so resources are limited. The human race is consuming too fast and replenishing too little.
Consumerism links in with materialism where beginning in the 1990s the main reason for attending university is to make big money and not to become an expert in a certain field or to help people in difficulty. Materialism shifts away from community, spirituality and integrity and leads to competition and disconnection.
Social status is now tied to your material belongings rather than your actual self worth. Its a vicious cycle. The poor try to imitate the rich while the rich try to imitate celebrities and so on. Sometimes we buy things we don't need even use solely to emulate people we regard as having "higher social status".
Buying material things is fine, we all need our certain comforts. But at the point where you have to buy something in order to fit in, now there's your problem. Our consumerism also needs to stay manageable and not go beyond what is environmentally-sustainable.
