We met the whole earth empty, we all found ourselves here including wild animals, serpents, scorpions e.t.c.
Meaning no one own this place rather, it is survival of the fittest.

Now the question is, how did we over-came those dangerous animals?
I just want you to understand something which is because "we are more intelligent being".

Now back to the topic "MEANING OF SECURITY".
To me i don't understand why someone will rely completely on police alone for security, what if they decide to turn against you? (i'm talking to individual here not government).

Rather what i know. I can't kill you if you are more intelligent than me and you can't kill me if I'm more intelligent to you. "That is true security"

Simply: if you want to survive here on earth try becoming more intelligent to everyone then you are safe.
I can assure you will get away with everything at ease and safe.
Although very few people on earth know this. (Own your environment)