He has left a few things out but in essence he is correct a thin blade is better for some tasks however like I said he has left a few things out. A machete is a poor tool to choose for building a log cabin. You would not choose a Mora to build a canoe. The cultures around the world that used these “thin” knives also had another tool.......The axe.

A sharp axe will cut a 14" tree down nicely however a chainsaw will do it faster. Which brings to point we have to realistically look at what we are going to need. Are we going to build a log cabin...if not then we can probably leave both the felling axe and the chainsaw at home.

The argument for thick heavy knives is a simple one, there is a saying “ a big knife can do the job of a small knife and an axe can't do either job well”. In the past you carried a rifle a thin knife and a light axe. That’s mainly because that’s all that was available in most mercantile’s and they were inexpensive.

Today manufacturers are making high performance reasonably priced heavy thick knives. We now have a choice other than a light axe. These knives will perform every bit as well as a light axe and if you happen to misplace or loose your small knife they can fill in quite nicely.

A good kit should have (among other things) A small and medium knife, heavy knife or light axe. This will pretty much cover all the bases.

In a survival situation it’s not the tool or it’s size that really matters. What matters is the persons ability to use it.