Conversation so far:
What was Immanuel Kant's political philosophy?
In Perpetual Peace: A Philosophical Sketch, Kant listed several conditions that he thought necessary for ending wars and creating a lasting peace.
What were Immanuel Kant's conditions?
Kant listed several conditions that he thought necessary for ending wars and creating lasting peace, which included a world of constitutional republics by establishment of political community.

Question: What else did he believe?
Self-contained rewrite: What else did Immanuel Kant believe besides conditions that he thought were necessary for ending wars and creating a lasting peace?