If more nations would fight against tyranny, the course of history would have been different.

1. A Option A: If more nations would fight against tyranny, the course of history would have been different.
2. B Option B: If more nations could have fought against tyranny, the course of history would have been different.
3. C Option C: If more nations fought against tyranny, the course of history would have been different.
4. D Option D: If more nations had fought against tyranny, the course of history would have been different.

How we write and check questions