"The “eminent common-law authorities (Blackstone, Coke, Hale, and the like),” Kahler v. Kansas, 589 U. S. ___, ___ (2020) (slip op., at 7), all describe abortion after quickening as criminal. Henry de Bracton’s 13th-century treatise explained that if a person has “struck a pregnant woman, or has given her poison, whereby he has caused abortion, if the foetus be already formed and animated, and particularly if it be animated, he commits homicide.” 2 DeLegibus et Consuetudinibus Angliae 279 (T. Twiss ed. 1879); see also 1 Fleta, c. 23, reprinted in 72 Selden Soc. 60–61 (H. Richardson & G. Sayles eds. 1955) (13th-century
treatise)."
They go on for a few pages going over common law before discussing the historical record in the US.
The court found otherwise, you can read the majority's evidence in their opinion at https://www.supremecourt.gov/opinions/21pdf/19-1392_6j37.pdf starting on page 17:
"The “eminent common-law authorities (Blackstone, Coke, Hale, and the like),” Kahler v. Kansas, 589 U. S. ___, ___ (2020) (slip op., at 7), all describe abortion after quickening as criminal. Henry de Bracton’s 13th-century treatise explained that if a person has “struck a pregnant woman, or has given her poison, whereby he has caused abortion, if the foetus be already formed and animated, and particularly if it be animated, he commits homicide.” 2 DeLegibus et Consuetudinibus Angliae 279 (T. Twiss ed. 1879); see also 1 Fleta, c. 23, reprinted in 72 Selden Soc. 60–61 (H. Richardson & G. Sayles eds. 1955) (13th-century treatise)."
They go on for a few pages going over common law before discussing the historical record in the US.