What do people on Planet Earth actually need to pursue true happiness?
Kal Elにより

1. Music
2. Holidays
2.1. (work&) rest/recovery time
2.2. new experience
3. Utopia?
4. Reality
5. negative forces
5.1. Failure
5.2. Sadness
5.3. Competition
6. Environment
6.1. Healthy Ecology
7. positive forces/feelings
7.1. Love
7.1.1. Family
7.1.2. Friends
7.1.3. Sex
7.2. Hope
7.3. Motivation
7.4. Confidence
7.5. Admiration
7.6. Happiness/Fun
7.7. Knowledge
7.8. Beauty
7.8.1. Art
7.9. Healthiness
7.9.1. Nutrition
7.9.1.1. Food
7.9.1.2. Water
7.9.1.3. Sweets
7.9.1.4. Drugs
7.9.2. Sports
7.10. Security
7.10.1. Home
7.10.1.1. House
7.10.1.2. Country
7.10.1.3. Culture
7.10.1.4. Family
7.10.2. Money
7.10.2.1. Security for life
7.10.2.2. Presents