Final answer:
Developed countries have experienced economic growth through a shift from agriculture to manufacturing, have various social services to prevent poverty, and typically show an even age distribution among their populations.
Step-by-step explanation:
The current state of the developed world includes various economic conditions and demographic trends. Economic growth in wealthy countries has historically been driven by a transition from an agricultural economy to one dominated by manufacturing and services. This has led to increased productivity and improved standards of living. Various forms of social services such as unemployment insurance, welfare, and food assistance help to protect citizens from absolute poverty. In terms of demographics, developed countries tend to have a more even distribution of age groups compared to undeveloped countries, which usually have larger young populations and fewer middle-aged and older individuals.
The shift from a high growth rate to a low one as countries develop economically is known as the demographic transition. Developed countries are often seen as having achieved a state of low demographic growth. Additionally, contemporary economic development tends to widen the gap between the affluent and the destitute. The challenge is fostering economic development in such a way that it can uplift the poor around the world and narrow this gap.