The Separation of Church and State in the United States
From the late 1940s to the late 1980s, the Supreme Court adhered to the stricter separationist position, striking prayer and Bible reading in the public schools, barring most funding of parochial schools, and striking the government’s display of the Ten Commandments and other religious symbols.
https://oxfordre.com/americanhistory/display/10.1093/acrefore/9780199329175.001.0001/acrefore-9780199329175-e-29
When Did Companies Become People? Excavating The Legal Evolution
But for 100 years, corporations were not given any constitutional right of political
speech; in fact, quite the contrary. In 1907, following a corporate corruption
scandal involving prior presidential campaigns, Congress passed a law banning
corporate involvement in federal election campaigns. That wall held firm for 70
years.
The first crack came in a case that involved neither candidate elections nor
federal law. In 1978 a sharply divided Supreme Court ruled for the first time that
corporations have a First Amendment right to spend money on state ballot
initiatives.
https://www.npr.org/2014/07/28/335288388/when-did-companies-become-people-excavating-the-legal-evolution