1) Okay, Mamooth wants proof of the premise. This one excerpt from Goldberg's column reads as such:
"In 2012, James Stimson, arguably America’s leading expert on U.S. public opinion, found that the country was more conservative than at any time since 1952."
Such was confirmed by this article:
Americans are more conservative than they have been in decades - The Washington Post
2) Another excerpt reads as such:
"Meanwhile, the cultural left has disengaged from mainstream political arguments, preferring instead the comforts of identity-politics argy-bargy. You judge political movements not by their manifestos but by where they put their passion. And on the left these days, the only things that arouse passion are arguments about race and gender."
No evidence needed here. You can simply look at how the left reacted in the the cases of Trayvon Martin and Micheal Brown, where they (and firebrands like Al Sharpton and Jesse Jackson) stirred racial tensions and promoted anti police sentiment. When conservatives criticized Obama, they decried it as racism. When people express concerns about immigration, liberals decry it as racism. As far as gender goes, some of the best examples to date is that of Hillary Clinton, any criticism of her is met with screams and chants of misogyny; and of the abortion debate, where people who present themselves as pro-life are seen as misogynists.
3) As far as Net Neutrality is concerned, it was a party line vote, not a rout. Two previous attempts at Net Neutrality failed in the courts. This current attempt will fail as well, since the same law they used previously is being used now, which caused the policy to be struck before.
4) Next, to further show the decline of the liberal philosophy, is that of their hold on college academia:
David W. Brenemen wrote in 1990 an article on which he expressed concern over the disappearance or drastic transformation of liberal arts colleges around America, he used 212 colleges which met his criteria of a liberal arts college,
seen here.This article confirmed that fear, 20 years later:
Some liberal arts colleges have transformed themselves into “research colleges” in order to attract students and faculty who value the mission of the research university. Other colleges have become “professional colleges,” implementing more academic programs in professional fields in order to compete for students who see higher education primarily as a path to a career and financial success. Some appear to have integrated liberal and professional education intentionally and crafted a new model of liberal arts college education. As this process has unfolded, the focused mission of the liberal arts college has expanded and become more diffuse, which has led to less consensus on what a liberal arts college is or what type of education it delivers.
The trend Breneman first pointed out more than twenty years ago is continuing. Some liberal arts colleges are disappearing, while others are changing their curricular focus and approach to undergraduate education. An increasingly smaller number of these institutions have been able to maintain a dominant arts and sciences emphasis in their curricula. Liberal arts colleges have played an important role in US higher education in spite of their small size and the percentage of students they enroll. The influence of this sector may be diminishing, however, as their numbers decrease and their educational focus becomes less clear.
Where Are They Now Revisiting Breneman s Study of Liberal Arts Colleges Association of American Colleges Universities
5) Other examples of the decline of liberalism and its ideology include the bankruptcy of Detroit, along with the failure of gun control in Chicago. More yet include open border policies regarding immigration, the disinterest in combating dangerous threats abroad, i.e. ISIS, and its failure (like conservatism) to reach to the other side to engage in bipartisan policymaking.
6) One of the more glaring failures of liberalism is how far it has departed from the wisdom of Jeffersonian liberalism. In Jeffersonian (classical) liberalism, every man was born with equal rights, but were born with different skills and traits, levels of intelligence and whatnot, or basically on unequal footing with one another. It held that government did not have the place to make all of them the same.
Simply put, Jeffersonian liberalism advocated individual rights and limited government, not an individual government limiting individual rights.
I could go on, but as Goldberg pointed out, and I wholly agree, liberalism in its current form is close to exhausting itself.