Popular dissent, often violent dissent, is as much a feature of capitalism as wage labour and profit. It has accompanied the system throughout its history. It's not anomolous to it.
The black, antiwar, womens' and gay movements took to the streets but primarily sought redress of their grievances through the Democratic Party, except for revolutionary minorities within these movements which sought to advance these struggles for reform into a more generalized assault on the system as a whole.
Of course, the bourgeosie doesn't like any kind of civil unrest, which is bad for business and can potentially progress beyond its control, but the kind of instability I was alluding to is of the extreme pre-revolutionary kind which threatens the existence of the capitalist system in depression and war.
Except perhaps for Carrol, I don't think there's anyone on the list who thinks the Sixties movements posed that kind of threat to American capitalism, although they caused the civic authorities and the politicians of both parties no end of headaches while winning the necessary reforms.
^^^^^^^ CB: Ok I didn't really intend to disagree with you except to point out that the "sixties/seventies" US turmoil had your "war" element , but not the economic catastrophe element.
I see now by "stability seems to be shaken" you meant "extreme pre-revolutionary" threat to the system, not as I thought a radical reform movement. I agree with you that the sixties and riots, etc. were not potentially an overthrow of capitalism.
However, have there been any true threats to the system in any of the developed capitalist countries besides Russia ? France 1968 ? Germany in the 20's ?