Perhaps er er  another way of looking at this would be to see it in terms of rightist deviations and leftist deviations and one might see erm the er the moderate policies  er of thirty seven to forty nine i in a sense as being erm  a rightist deviation, one might see forty six forty seven as being leftist deviations and  the left is seeking to overcome rightist deviations, the right seeking to overcome leftist deviations and you've got some kind of oscillation between the two.