Dominionism (related to the Christian Reconstruction movement), which has gained popularity in Christian circles since the 1970s, is nothing new. Isaac Backus explained the ultimate root of the error.
The covenant of circumcision gave those who were born in it a right to treat all others, both as to worship and commerce, as no others had any right to treat them. A right to office also in that church was hereditary. When our Savior came, he fulfilled the law, both moral and ceremonial, and abolished those hereditary distinctions among mankind. But in the centuries following, deceitful philosophy took away the name which God has given to that covenant, (Acts 7:8) and added the name Grace to it; from whence came the doctrine, that dominoin is founded in grace. And although this latter name has been exploded by many, yet the root of it has been tenaciously held fast and taught in all colleges and superior places of learning, as far as Christianity has extended, until the present time; whereby natural affection, education, temporal interest, and self-righteousness, the strongest prejudices in the world, have all conspired to bind people in that way, and to bar their minds against equal liberty and believers’ baptism. But the writings of our learned ministers in England have communicated much light to this country; to which more was added by the travails and labors of our southern fathers and brethren.
All of the modern paedobaptists arguing against theonomy and dominionism by insisting that “Abraham is not Moses” are missing the root of the error. Backus is correct that the error is rooted in an unbiblical understanding of Abraham.