While we make use of many varieties of data, our primary sources come
from county tabulations drawn from the U.S. censuses of population
and agriculture. We have collected those data for the decennial
population censuses from 1880 through 2000, as well as for the
agricultural censuses (which were decennial until 1920 and then more
frequent thereafter) from 1880 through 1997.3 In addition to
census-based sources, we have collected other county-level
tabulations of social characteristics. We use the population and
social indicators data to understand population structure and
change, and the agricultural census data to understand agricultural
land use. Their consistency, as well as the effectiveness and
long-term quality of the U.S. census, have made this part of our
project straightforward. Some of these data were available to us in
digital form, and others we collected in print form and then
hand-keyed into our database. All of these data are described in
Gutmann et al.
(1998). Since that document was published, we have added
data from recent censuses (1997 agriculture and 2000 population),
while maintaining their content and structure. Although our study
area is not coterminous with the 10 states, we have collected data
that covered the entire area of the 10 Great Plains states, and
often neighboring states, especially Iowa and Minnesota.
Answer: it signaled the end of legalized racial segregation in the schools of the United States, overruling the "separate but equal" principle set forth in the 1896 Plessy v. Ferguson case.
Explanation: In this milestone decision, the Supreme Court ruled that separating children in public schools on the basis of race was unconstitutional.
Answer:
The social ties that accompany a sense of belonging are a protective factor helping manage stress. When we feel we have support and are not alone, we often cope more effectively with difficult times in our lives. Coping well with hardships decreases the physical and mental impact of these situations.
Explanation:
Answer:
Chinese historians have spent well over a thousand years trying to understand why the Han Dynasty collapsed. Over time they developed three main theories: 1) bad rulers; 2) the influence of empresses and court eunuchs over child emperors too young to rule by themselves; and 3) the Yellow Turban Revolt.
Explanation:
