According to fakeye and crompton's travel motives, intellectual enrichment is the needs for SELF ESTEEM in Maslow's hierarchy of needs.
The approximate current population of the entire world 7,580,140,000. Hope this helped!
If I understood your question correctly, the reason why we're moving differently than people in ancient history is that we have new available technologies which enable us to transport from one city to another via car, train, or airplane. None of these were available during ancient times. What remains the same, however, is that we still walk by foot for shorter distances, similar to our ancestors.
