How long did the Zhou dynasty fight during the period of the Warring states?Immersive Reader

About 254 years

The period of the Warring States (Zhanguo or Chan-Kuo) refers to the era of about 475 BCE to 221 BCE. It commenced at a time of when the numerous petty city-state kingdoms of the Spring and Autumn period had been consolidated into seven major contenders and a few minor enclaves.

Explanation:

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.

in griswold v. connecticut (1965), the supreme court ruled that a state's ban on the use of contraceptives violated the right to marital privacy.