Assignment task:
Choose one (emphasis: only one; no more than one) important legal principle and discuss how that legal principle evolves through all the cases: 1969 Street v NY, 1973 Hess v IN, 1974 Spence v WA, 1989 TX v Johnson.
Engage each case by its holding and key reasoning lines. Do not summarize (or, a "brief") for each case distinctively. In order to provide quality writings, focus on the most important things (i.e., the holding and key reasoning lines) out of each case and square the essence of each case with one other.