From the standpoint of consumption, this is easily seen. Just imagine yourself placed at any random point in the United States.
Coffee is equally important to the developing world where it is produced.
Coffee is a major source of foreign exchange for dozens of tropical countries and provides an opportunity for thousands of farmers to earn cash income off small parcels of land. Sipping a cup of coffee is a ritual that is played out millions of times a day throughout the world. It is an act that ties together consumer, retailer, roaster, broker, producer and farm laborer in complex relationships about which we rarely ponder. But the connections are deeper than mere commerce. For example, many of the millions of migratory birds that criss-cross the continents have come to depend upon the traditional coffee farms that still produce much of the coffee we drink.