Read the following passage, which is adapted from the Declaration of Independence, 1776.
[1] A Prince whose character is thus marked by every act which may define a Tyrant, is unfit to be the ruler of a free people. [2] We have not been wanting in attentions to our British brethren. [3] We have appealed to their native justice and magnanimity, and we have conjured them by the ties of our common kindred to disavow these usurpations, which, would inevitably interrupt our connection and correspondence. [4] We must, therefore, acquiesce in the necessity, which denounces our Separation, and hold them, as we hold the rest of mankind, Enemies in War, in Peace Friends.
Which sentence best introduces the issue of the passage?