Step 1: Why democracy tends towards peace.
Because everyone gets an equal vote and equal legal standing regardless of religion, caste or gender, democracy removes much of the resentment that fuels conflict elsewhere.
Step 2: Legal channels instead of violence.
Disagreements get argued out in Parliament, courts and public debate, and citizens can protest peacefully, so grievances rarely need to turn violent.
Step 3: Rights and respect for diversity.
Guaranteed freedoms of speech and religion let people practise their own beliefs while still being part of one nation, and this everyday tolerance keeps communities living side by side without friction.
Step 4: Conclusion.
Equality, lawful ways to settle disputes, protected rights and respect for diversity are exactly why democracies manage to sustain peaceful and harmonious life among their citizens.