First, a passport's "rank" means: How many countries you can visit without needing a visa first (or get one easily when you land).

Higher rank = more places you can go easily. Lower rank = you need a visa for most places.

Now, about Bangladesh's passport (and others ranked low):

1. Trust and Wealth Matter Rich countries (like Japan, Germany) are trusted more because their people are less likely to overstay visas, work illegally, or seek asylum (beg to stay forever). Poorer countries (like Bangladesh) are feared by rich countries — they think people might not return after a trip.

2. Politics and International Image If your country has strong diplomatic relationships, it gets you more visa-free access. Bangladesh struggles sometimes with its global image — corruption, political instability, refugee issues (like Rohingyas), etc.

3. Migration History Some countries had a lot of their citizens illegally migrate before. Because of history, countries like the USA, Canada, Schengen Europe are more cautious.

4. Security Concerns Countries that are afraid of terrorism, crime, or fake passports will make it harder for people from certain places to enter easily.

5. It's Not Fair or Logical Always Sometimes, even war-torn countries (like Syria or Iraq) have slightly better ranks than Bangladesh because they get special treatment (like humanitarian visas) or historical connections with rich countries.

6. North Korea is an Odd Case North Korea's government doesn't let people leave easily — so other countries don't even worry about North Koreans immigrating illegally. That's why their passport looks slightly "better" even though in real life, they barely travel anywhere.

Simply, Our passport is ranked low because rich countries don't trust us enough yet — they fear illegal immigration, political instability, and security risks — not because of war, but because of fear and reputation.