Ответ:

1 In the past, people HAD  a lot of suffering.

2 Back in history, they SUFFERED from wars, conflicts, and natural disasters.

3 In the modern days, people SUFFER, too.

4 Modern sufferings are brought by wars, conflicts and natural disasters, like in the past.

5 Modern man thinks that the world is ruled by people.

6 In the future, life will be destroyed by man.

Объяснение: