Identify the key event. Choose one event or condition as a starting point. Once you know the starting point, you can look for possible causes and effects of that event. What is the key event shown in the chart above?

stone age, iron age, olden days, prehistory

explanation:

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stan bts

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.

the answer is "focused on"

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