Why we're the twelve tables created?

That is easy  the Twelve Tables (aka Law of the Twelve Tables) was a set of laws inscribed on 12 bronze tablets created in ancient Rome in 451 and 450 BCE. They were the beginning of a new approach to laws where they would be passed by government and written down so that all citizens might be treated equally before them.

in 32-page handwritten address, washington urged americans to avoid excessive political party spirit and geographical distinctions, in foreign affairs he warned against long-term alliances with other nations. the address was printed in philladelphia's american daily advertiser on september 19, 1796

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.