In what ways did Lyndon Johnson improve life for Americans through his Great Society?

Most of what Lyndon Johnson did through the Great Society
was meant to help poor people.  So a lot of people who are not poor got no direct
benefits from the Great Society.

For example, some of the
most high profile programs were Head Start, which is preschool for poor kids, Medicaid,
which is health care for poor people, and general welfare programs, which are, of
course, for poor people.

So LBJ helped improve the lives
(you can argue) of poor people through programs like the three I just mentioned.  I
would say that most middle class people were not directly
affected.