how did George Washington help contribute in establishing a stable government after the Constitution?

Answer 1

many things. but to name one. he actually relinquished his powers as President to John Adams. for the newly minted American people this was unheard of...having come from life under a monarchy where people don't simply hand powers over to someone else.

Answer 2

The biggest ting he did was actually give up his powers to a successor which doesn't sound like much to US citizens today but it was revolutionary.

The other BIG thing he did was establish the Federal Banking system and got the young nation on stable economic footing.