In 35 words or fewer, explain what this fact tells us about the past: The Common Era begins with the birth of Jesus of Nazareth.​

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.

the united states constitution defines the structure of the national government and dictates the scope and limitation of its powers. the constitution is known as “the supreme law of the land” and all other laws are measured against it. the application of the articles and amendments of the constitution comprise constitutional law.

in addition to the united states constitution, each state has its own constitution and therefore, its own body of constitutional law as well. state constitutions resemble the federal constitution in that they outline the state government’s structure of legislative, executive and judicial branches as well as contain a bill of rights.

but there are various ways state constitutions differ from the federal constitution. often, state constitutions are much longer and more detailed than the federal constitution. state constitutions focus more on limiting rather than granting power since its general authority has already been established. as a result, the constitution of alabama is six hundred pages long whereas the federal constitution can be easily read in one sitting front to back.

the details in state constitutions are not particularly “constitutional” in nature. they often address topics unique to the state. the federal constitution can only be amended through a lengthy process designed to limit changes to this fundamental document. as a result, it has only been amended seventeen times since the adoption of the bill of rights in 1791.

state constitutions are more open to amendments. amendments can be proposed by legislature, a constitutional commission or citizens’ petition and can be accepted by referendum.   for example. the constitution of massachusetts has been amended one hundred and twenty times. the constitution of georgia has even been replaced altogether as many as ten times.

japan is located on a chain of islands called an archipelago. it is made up of four main islands and thousands of smaller ones. the terrain is mountainous, which means there is not a lot of good land for farming. because of the geography, the japanese relied on the sea for many aspects of daily life.

the mandate of heaven or tian ming (chinese: 天命; pinyin: tiānmìng; wade–giles: t'ien-ming) is a chinese political and religious doctrine used since ancient times to justify the rule of the king or emperor of china. according to this belief, heaven (天, tian)—which embodies the natural order and will of the universe—bestows the mandate on a just ruler of china, the "son of heaven" of the "celestial empire". if a ruler was overthrown, this was interpreted as an indication that the ruler was unworthy, and had lost the mandate. it was also a common belief among citizens that natural disasters such as famine and flood were signs of heaven's displeasure with the ruler, so there would often be revolts following major disasters as citizens saw these as signs that the mandate of heaven had been withdrawn.[1]

a brief flow chart describing the dynastic cycles in imperial china on claiming to withdrawing the mandate of heaven

the mandate of heaven does not require a legitimate ruler to be of noble birth, depending instead on the just and able performance of the rulers and their heirs. dynasties such as the han and ming dynasties were founded by men of common origins. the concept is in some ways similar to the european concept of the divine right of kings; however, unlike the european concept, it does not in theory confer an unconditional right to rule, despite this being exactly the case in practicality. the mandate would in theory be a preoccupation in a ruler's lifetime, when he would hold onto the mandate and live according to heavens. intrinsic to the concept of the mandate of heaven was the right of rebellion against an unjust ruler. chinese historians interpreted a successful revolt as evidence that heaven had withdrawn its mandate from the ruler. throughout chinese history, times of poverty and natural disasters were often taken as signs that heaven considered the incumbent ruler unjust and thus in need of replacement. the mandate of heaven was often invoked by philosophers and scholars in china as a way to curtail the abuse of power by the ruler. while each dynasty was not the same, they each had a lineage that passed on the prospective ruler by order of generational descent or their priority of birth. many emperors during the imperial times would optimize to have many sons who could be candidates to fill the position after the current ruler has died. in addition heaven was thought to be of how a ruler's works and performance was, which reflected upon how favorable they would be to heaven.