I recommend this essay in The Nation by William Deresiewicz. An excerpt:
"[. . .] It wasn’t supposed to be like this. When I started graduate school in 1989, we were told that the disastrous job market of the previous two decades would be coming to an end because the large cohort of people who had started their careers in the 1960s, when the postwar boom and the baby boom combined to more than double college enrollments, was going to start retiring. Well, it did, but things kept getting worse. Instead of replacing retirees with new tenure-eligible hires, departments gradually shifted the teaching load to part-timers: adjuncts, postdocs, graduate students. From 1991 to 2003, the number of full-time faculty members increased by 18 percent. The number of part-timers increased by 87 percent—to almost half the entire faculty.
[. . .] But leadership will have to come from somewhere else, as well. Just as in society as a whole, the academic upper middle class needs to rethink its alliances. Its dignity will not survive forever if it doesn’t fight for that of everyone below it in the academic hierarchy. (“First they came for the graduate students, and I didn’t speak out because I wasn’t a graduate student…”) For all its pretensions to public importance (every professor secretly thinks he’s a public intellectual), the professoriate is awfully quiet, essentially nonexistent as a collective voice. If academia is going to once again become a decent place to work, if our best young minds are going to be attracted back to the profession, if higher education is going to be reclaimed as part of the American promise, if teaching and research are going to make the country strong again, then professors need to get off their backsides and organize: department by department, institution to institution, state by state and across the nation as a whole. Tenured professors enjoy the strongest speech protections in society. It’s time they started using them. [. . .]"