In December 1882, ... appeared before the justices of the Supreme Court... to argue that corporations like his client, the Southern Pacific Railroad … - Adam Winkler

Corporations did not win their constitutional rights in quite the same way as women, racial minorities, or gays and lesbians... [who] pursued their claims in both courts of law and the court of public opinion. To achieve lasting constitutional change... required more... Lawsuits were backed up by broad-based, popular social movements that demanded rights for those who had been denied the original premise of We the People.

The National Rifle Association’s days of being a political powerhouse may be numbered.
Why? The answer is in the numbers.
Support for, and opposition to, gun control is closely associated with several demographic characteristics, including race, level of education and whether one lives in a city. Nearly all are trending forcefully against the NRA.
The core of the NRA’s support comes from white, rural and relatively less educated voters. This demographic is currently influential in politics but clearly on the wane.
...the heart of the organization’s power is the voters it can turn out to vote, and they are likely to decline in number.

Although Americans often think of the Supreme Court as a bulwark to protect minority rights against the tyranny of the majority, the court's record... was dishearteningly bad prior to the 1950s. For most of American history, the Supreme Court failed to protect the dispossessed and marginalized... [T]he court's record on corporate rights was much different. In 1809... corporations won that first case—and have compiled an impressive list of victories... [T]he court has insisted that broad public sentiment favoring business regulation must bend to the demands of the Constitution.