Crossword puzzle clue "law and freedom without force per kant"

"Law and freedom without force," per Kant

How humanity exists, per Kant

He inspired Kant and Einstein

Answer to the riddle "What has rivers without water, forests without trees, and cities without houses?"

Folkie who "sang us into freedom," per Maya Angelou

20 cigarettes per unit and 10 units per carton, e.g.?

Kant was one

"If man makes himself ___ he must not complain when he is trodden on" (Immanuel Kant)