The 2021 threat diagram is criticized for joining many subjects without explaining what the connections mean. Railguns, novel weapons, space, post-COVID security, climate change, and regional instability appear within the network. In the described layout, reaching high-energy weapons from railguns requires a route through several other subjects instead of a direct connection. That makes it difficult to determine what the diagram adds to a list of threats or how it clarifies the defence problem.
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What the 2021 threat diagram fails to explain
A threat diagram can contain many relevant subjects while leaving their relationships and strategic implications unclear.