| A | B |
| Darwin, Charles | inventor of the theory of evolution |
| debt | a state of owing |
| deforestation | the destruction of forests around the world, especially rain forests |
| delta | a soil deposit that builds up into land areas where rivers run into lakes or oceans |
| demilitarize | to significantly reduce the size of the military of a nation |
| democracy | form of government in which the people have supreme power |
| Deng Xiaoping | leader of Communist China who attempted to modernize China's ceconomy by introducing some capitalism - he also developed the One-Child Policy |
| dependence | relying on something or someone else |
| deportation | forcing one to leave a country |
| descendant | coming from an ancestor or source |
| desertification | the change of semi-desert land into desert land |
| detente | period of relaxation of Cold War tensions between the United States and the Soviet Union in the 1970s economy based on the consumption of goods manufactured by other people |
| developing nation | a nation that is working toward industrialization |
| dharma | in Hinduism, the duties and obligations of each caste' "the rules" |
| dictator | a person holding complete autocratic power through violence |
| dictatorship | form of government in which the leader has complete power, which he holds by force |
| direct democracy | a democracy in which every individual has a vote in every decision faced by the government - Athens is best known for developing this system of government |
| disarmament | to disband or reduce the size and strength of the armed forces of a country |
| discrimination | distinction and especially unjust distinction made against one group or person in favor of another |
| dissident | someone who speaks out against the government |
| dissent | to differ in opinion |
| distribution | the position, arrangement, or frequency of occurrence |
| diversity | the condition of having differences |
| domination | exercise of authority or power |
| dynasty | a succession of rulers from the same line of descent |