Whoa hold it peeps!!! It has nothing to do with any serious issue. I'll just be showing a page from the manga
In the last column we see 3 panels.
1st: Hiruzen--- if you read at the writing, why do you think Kishi decided to write it where Hiruzen was shown? Most probably because majority of the clans joined Konoha during the 3rds rule. That tells us something additional about Hiruzen's time as hokage.
2nd: Tobirama-- The writings also indicate that Tobirama made the village system into something more concrete. He made schools, police and improved relations with other nations( or at least tried at some point). He devised the ninja system of Konoha that is still used today.
3rd: Minato-- What to say... he protected the village and his new born son from Kurama and went as far as to seal it within his own son and the rest in himself( the chakra part). And we all know that during his rule, there was no world war, indicating some sort of peace with other nations.
Thats all folks! Sry if you thought it was a pointless read but I loved that part among all the other manga pages.