What did President Lyndon Johnson do that ended up shifting the nation's political landscape in the most dramatic way since Reconstruction?

President Lyndon Johnson passed the landmark law of the civil rights, in 1964. He passed this in the memory of President Kennedy. This law provided equal civil status to the black population and prohibited the segregation of school, restaurants, public toilets, employment, and education. He also started the war on poverty, to end poverty in the nation. For this, he promoted a billion dollar campaign. He also started Volunteers in service to America in which volunteers were invited from many organizations such as schools, and underprivileged families and job training were provided to them.