Demographic developments in Western Europe are examined in this report. It can be used by secondary and college level teachers in preparing lessons or by students themselves. There are three major parts. The first part, "Past Trends," focuses on the increase in European population. The size of that population and its growth over a long period are considered. Attention is also paid to its spatial distribution, and then to changes in the birth and death rates over time. Part II examines the population structure of Western Europe. The most important change in the age distribution of Western European countries has been the increase of the proportion of the elderly caused by a deceleration in the population growth, in contrast to developing countries where this deceleration has not yet occurred. Also examined in this section are two other aspects of the population structure: the dependency ratio and the activity rate (the ratio of the labor force to the total population). Part III deals with "Recent and Future Developments" in population trends. Attention is paid to the trends of birth and death rates from 1950 to 1977, as well as to the underlying factors influencing these rates. How recent levels of births and deaths might affect the development of population in the future is also discussed. (RM)