This is the sample.
The ocean has been a challenge for a long time, since the ocean is a fearful and unpredictable place for mankind. It has encouraged a willingness to overcome the challenge for the purpose of food procurement and migration in prehistoric times, for exchanges, war and trades in historical periods and for industrial development and leisure in these days.
The sentence has different periods of the time when it is describing the purpose of overcoming the challenges for each period. Although I used present perfect tense because I thought it is covering present time from the past.
Is it OK to use like this ??