In the Republic, Thrasymachus declares that "the just is nothing other than the advantage of the stronger" (338c). What does he mean and what evidence do Thucydides and Plato provide against his view?

In the Republic, Thrasymachus declares that "the just is nothing other than the advantage of the stronger" (338c). What does he mean and what evidence do Thucydides and Plato provide against his view? - FOXESSAYHUB

In the Republic, Thrasymachus declares that “the just is nothing other than the advantage of the stronger” (338c). What does he mean and what evidence do Thucydides and Plato provide against his view?