These breakthroughs are connected with each of these dates because they are forerunners of an invention that is a milestone in human communication: the printing press.
About 25,000 years ago humans learned to speak. Next, The first picture writings date from 8,000 years ago. Followed by the first evidence of an alphabet which comes from Phoenicia around 1,500 BCE. In 600 CE The Chinese introduced woodblock printing.Finally,Johannes Gutemberg invented the first practical printing press in 1,450CE
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D. Allowing Texas into the Union would upset the balance of slave and free states in Congress. Though it soon became a state since Manifest Destiny was a very popular idea at the time.
