Colonisation of the ocean was considered enevitable in that era. It is also covered in the 1970 book Future Shock by Alvin Toffler. However, so far, it has been

Colonisation of the ocean was considered enevitable in that era. It is also covered in the 1970 book Future Shock by Alvin Toffler. However, so far, it has been easier to improve utilisation of land.