How to remove the consequences of the chmod command?

Question

linux

Good evening. Executed by mistake
chmod -R 777 /
As a result, the rights 777 were granted to all folders. Is there any way to cancel the consequences of the command?

Answer 1

No way
Only if you try to set the default 755, but not the fact that it used to be the same.
In theory, not only folders were affected, but all files became executable It's
easier to rearrange the system)

Answer 2

do reinstall all packages in the system??
Will the operating system withstand this very interesting