This episode could've been a lot better if Yarnek had explained that each of the "historical figures" represented different aspects of good or evil. For example.
Kahless- the founder of Klingon ideal of winning honor through combat- even brutal combat
Genghis Khan- super expansionism and use of massive brutality to achieve his ends (including massive executions of innocent people
Zora- scientists who used innocent intelligent beings like guinea pigs (NAZIs also did that).
Colonel Green- leader who used deception and duplicity to defeat his enemies.
Lincoln- example of a sensitive noble leader who sacrificed for his people.
Surak- thoughtful man of peace who completely transformed an entire world from savage and warlike to logical and peaceful.
Kahless- the founder of Klingon ideal of winning honor through combat- even brutal combat
Genghis Khan- super expansionism and use of massive brutality to achieve his ends (including massive executions of innocent people
Zora- scientists who used innocent intelligent beings like guinea pigs (NAZIs also did that).
Colonel Green- leader who used deception and duplicity to defeat his enemies.
Lincoln- example of a sensitive noble leader who sacrificed for his people.
Surak- thoughtful man of peace who completely transformed an entire world from savage and warlike to logical and peaceful.