Answer:
The impact of King's claim, "Injustice anywhere is a threat to justice everywhere," is that it highlights the interconnectedness of justice and the idea that injustice in one place can have negative consequences for justice elsewhere. By making this statement, King is emphasizing the idea that justice is not something that can be isolated or compartmentalized, but rather is a universal principle that should be upheld everywhere.
King goes on to refine this claim by arguing that the struggle for justice is not just a local or national issue, but a global one. He states that "whatever affects one directly, affects all indirectly," emphasizing the interconnectedness of justice and the idea that injustice in one place can have a ripple effect and ultimately impact justice everywhere. In this way, King is arguing that the fight for justice is a collective responsibility that requires the efforts of people from all walks of life and from all corners of the world.