I note the obvious tendency of nearly all justices to get more “liberal” over time. Interesting that Scalia was, in this rating, less conservative than Thomas, and he was the most conservative SCOTUS justice for only one term.
Interesting that post-WWII nadir in the conservatism of the median justice was in 1966, and close on its heels was the median in 1964 - the latter being the year of the unanimous - and according to Antonin Scalia scandalous - New York Times Co. v. Sullivan decision.
Scalia pointed out that the reason for the entire Bill of Rights was to reassure the doubters that no rights were compromised by the Constitution. As such the Bill of Rights was crafted not to change the right to compensation for libel. And therefore, Justice Brennan’s claim in Sullivan that ". . . libel can claim no talismanic immunity from constitutional limitations. It must be measured by standards that satisfy the First Amendment” is a fig leaf for restrictions on libel suits being made up by the Warren Court.
I note that your graph stops at the end of ’17 . . .
I get nothing from the link presented . . .