Kingdom or Kerygma
It is for obvious reasons that evangelization leans more in our time towards preaching the kerygma (i.e. the basic proclamation of the Faith) rather than the kingdom, for while the kerygma presumes that the hearer know nothing about religion, the kingdom cannot be uttered without the recipient having some knowledge base.
And oddly enough that base is not the kerygma (for the kingdom was preached long before it ever was) but a basic understanding of the love story between God and man.
“The Kingdom of God is at hand”, and similar proclamations only made sense in that ancient Judaism was already