As (it) becomes clear, Chisman's work was about both change and continuity.
As (it) seems clear, however, that's not likely to happen any time soon.
Are these sentences are OK with or without 'it'? Because I have seen some sentences begining without a subject after 'as' (e.g. as can be seen in the figure below/above).
With "it" the first four words mean "At the same time that it becomes clear".
Without "it" the first three words mean "In the same way as it becomes clear".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.