A declaration of the causes which impel the State of Texas to secede from the Federal Union
... Texas abandoned her separate national existence ... She was received as a commonwealth holding, maintaining and protecting the institution known as negro slavery -- the servitude of the African to the white race within her limits -- a relation that had existed from the first settlement of her wilderness by the white race, and which her people intended should exist in all future time. Her institutions and geographical position established the strongest ties between her and other slave-holding States ... But what has been the course of the government of the United States, and of the people and authorities of the non-slave-holding States, since our connection with them? ...
In all the non-slave-holding States .. the people have formed themselves into a great sectional party .. based upon the unnatural feeling of hostility to these Southern States and their beneficent and patriarchal system of African slavery, proclaiming the debasing doctrine of the equality of all men, irrespective of race or color -- a doctrine at war with nature, in opposition to the experience of mankind, and in violation of the plainest revelations of the Divine Law. They demand the abolition of negro slavery .. , the recognition of political equality between the white and the negro races, and avow their determination to press on their crusade against us, so long as a negro slave remains in these States ...
And, finally, by the combined sectional vote of the seventeen non-slave-holding States, they have elected as president and vice-president .. two men whose chief claims to such high positions are .. their pledges to continue them to the final consummation of these schemes for the ruin of the slave-holding States ...
We hold as undeniable truths that the governments of the various States, and of the confederacy itself, were established exclusively by the white race, for themselves and their posterity; that the African race had no agency in their establishment; that they were rightfully held and regarded as an inferior and dependent race, and in that condition only could their existence in this country be rendered beneficial or tolerable ...
... seeing that the federal government is now .. under the control of our enemies .. and realizing that our .. State can no longer look for protection, but to God and her own sons -- We the delegates of .. Texas .. assembled, have passed an ordinance dissolving all .. connection with the government of the United States of America ...
https://www.tsl.texas.gov/ref/abouttx/secession/2feb1861.html