A variety of reasons. The ongoing debate about federal power had tipped to the side of the 'Federalists,' for one thing. But also, and perhaps more importantly, the practical experience of the nation during the War for Independence had demonstrated that, without a stronger federal government, it would risk failing in its 'grand experiment' of republican self-governance.
The word Vietnam is derived from two Chinese words meaning "the Viet kin in the South". Traditionally, the people of Vietnam have been regarded by westerners as staunchly xenophobic, and, as such, have been viewed as having a long standing contempt for Chinese influence on the region. Border and island disputes have only exacerbated long-standing tensions between the two nations. Vietnam and China share many common cultural traditions which originated from the wet rice cultivation. China controlled Vietnam for about 1000 years, a rule which ended in 939CE. Thus, Vietnamese culture, writing, politics, religion, etc. were sinicized to a a certain degree. Yet the degree to which Vietnam preserved a distinct identity and maintained separate traditions should also be noted. During the 1st and 2nd Indochinese Wars, Vietnam grew closer to PR of China and received some funding, material, and advisors from the PRC. However, war with China in 1979 renewed hostilities. the reason why Vietnam and china are close because is that they are both communism country, there isn't much comminusim country left in the world
They no longer had slaves to do all the work 4 them
They wrote a new constitution in 1917 after a 7 year revolution against the former government. the constitution made many changes and the first constitution that was given social rights, rights for healthcare, the right for a place to live and lastly the right to work in any occupation that you want. all these right were given to the people of mexico.
hope this helps.