In retrospect, it's clear that...

Meaning

With hindsight, it's obvious that...

Examples

• John: The project failed, unfortunately.
• Alice: Yes. <b>In retrospect, it's clear that</b> we should have hired a consultant sooner.
• John: We really should have foreseen that problem.
• Alice: True. <b>In retrospect, it's clear that</b> better communication was crucial.