Question

. . . [A] great portion of that time which ought to have been devoted calmly and impartially to consider what alterations in our federal government would be most likely to procure and preserve the happiness of the Union was employed in a violent struggle on the one side to obtain all power and dominion in their own hands, and on the other to prevent it; and that the aggrandizement of particular states, and particular individuals, appears to have been much more the subject sought after than the welfare of our country . . . .
When I took my seat in the Convention, I found them attempting to bring forward a system which, I was sure, never had entered into the contemplation of those I had the honor to represent, and which, upon the fullest consideration, I considered not only injurious to the interest and rights of this state but also incompatible with the political happiness and freedom of the states in general. From that time until my business compelled me to leave the Convention, I gave it every possible opposition, in every stage of its progression. I opposed the system there with the same explicit frankness with which I have here given you a history of our proceedings, an account of my own conduct, which in a particular manner I consider you as having a right to know. While there, I endeavored to act as became a free man and the delegate of a free state. Should my conduct obtain the approbation [act of approval] of those who appointed me, I will not deny it would afford me satisfaction; but to me that approbation was at most no more than a secondary consideration—my first was to deserve it. Left to myself to act according to the best of my discretion, my conduct should have been the same had I been even sure your censure would have been my only reward, since I hold it sacredly my duty to dash the cup of poison, if possible, from the hand of a state or an individual, however anxious the one or the other might be to swallow it . . . .

THE QUESTION: Why, according to Luther Martin, did he walk out of the Constitutional Convention?

Answer 1

He was an anti federal list .

Answer 2

He was anti Federalist and opposed to the plan for a strong central government, Martin displayed his disapproval of what the Convention produced by walking out without signing the Constitution.