Maybe some details will help.

1. What do you envision using the spear for? If you want to hunt with it, how do you propose to train for that? Someone points out in the thread that spear hunting is a specialized skill

2. Where do you plan to get your spear from? Do you think we should have one ready at home, or do you think of it as the sort of thing that you make once you find yourself in a survival situation?

3. It seems to me that a throwing spear (javelin, I suppose) is different from a spear for boar hunt, and that's different from a spear that could fend off a swordsman (don't worry -- in a survival situation you're unlikely to run across a medieval warrior). What kind of spear are we talking about?

Does anyone here actually have experience of doing stuff with a spear?