Answer
Two factors each need to be considered to assess the Will of God; the long term goal and the short term goals of God on one hand and the Will of God (faith) and the free will (works) He gave to human beings on the other hand.
Explanation
The Scripture talks about a long term Goal or Will of God which He has set for all humanity:
Long Term Goal
Even before creating Adam and Eve, God had set His long term goal for the entire humanity in place.
“In all his wisdom and insight God did what he had purposed, and made
known to us the secret plan (Will=Thelema) he had already decided to
complete by means of Christ. This plan, which God will complete when
the time is right, is to bring all creation together, everything in
heaven and on earth, with Christ as head. All things are done
according to God's plan and decision” (Eph 1:8-11).
In other words:
“God our Savior, who wills all men to be saved, and to come to the
full knowledge of the truth” (1 Tim 2:3-4).
Short Term Goals
However, during the course of human history, God has set various short term goals which do not disturb His ultimate long term goal in any way.
One example:
“And I will harden Pharaoh's heart, and he will pursue you. And I will
be honored through Pharaoh, and through all his armies. And the
Egyptians shall know that I am Jehovah. And they did so” (Exo
14:4).
Does the above mean that Pharaoh is lost forever?
Not at all.
“Being ignorant”, Pharaoh “did it in unbelief” (because God had hardened his heart in His short term goal) so that he will “receive mercy” (in the long term goal) – 1 Tim 1:13.
“For God has shut up all in unbelief (short term goal), so that He
might show mercy to all (long term goal)” - Rom 11:32.
“Indeed as regards the gospel, they (Jews) are enemies for your sakes
(short term goal). But as regards the election, they are beloved for
the fathers' sakes (long term goal) – Rom 11:28.
“And so all Israel shall be saved” (long term goal) – verse 26.
Will of God
The ultimate Will of God is stated in the Scripture:
“In just the same way your Father in heaven does not want any of these
little ones to be lost” (Mat 18:14).
However, God has given a true free will to humanity so that the latter would (should) follow God through self-volition and love.
“Behold, I have set before you today life and good and death and evil,
… I call Heaven and earth to witness against you today that I have set
before you life and death, the blessing and the curse. Therefore,
choose life, that you may live, you and your seed” (Deut 30:15, 19).
We may see clearly that God gives “choices” of life and death. He doesn’t “force” anyone to love Him but “advises” to choose life.
The ultimate decision is on each individual and this is the free will which is real.
So chances are there that some may not follow good advice. Hence we read in Mat 7:19:
“Every tree that doesn't produce good fruit will be cut down and
thrown into a fire”.
Also,
“For how can those who abandon their faith be brought back to repent
again? They were once in God's light; they tasted heaven's gift and
received their share of the Holy Spirit (they were true Christians); they knew from experience that God's word is good, and
they had felt the powers of the coming age. And then they abandoned
their faith! It is impossible to bring them back to repent again,
because they are again crucifying the Son of God and exposing him to
public shame” (Heb 6:4-6).
The above case is the result of the will of each man and not the Will of God.
The free will God gave us is real and true.
Faith and Works
This is a very controversial issue debated through centuries. However, the answer is simple. Faith is a gift from God:
“For by grace you are saved, through faith, and this not of
yourselves; it is the gift of God” (Eph 2:8).
Faith is a free gift from God given through the Holy Spirit. It is through faith that we believe. This is only a beginning. But faith alone will not do. We need to convert this faith into fruits of good works.
Faith is like the life sap in a tree through which the tree brings forth its fruits. So, Jesus Himself said:
“every tree is known by its own fruit” (Luke 6:44);
not by its leaves, or stem or roots.
Finally in the last judgment, God judges people based on their “works” done through their faith and not by their faith alone:
“And I saw the dead, the small and the great, standing before God. And
books were opened. And another Book was opened, which is the Book of
Life. And the dead were judged out of the things written in the books,
according to their WORKS” (Rev 20:12).
“And the sea gave up the dead in it. And death and hell gave up the
dead in them. And they were each judged according to their WORKS”
(Rev 20:13).
Paul himself says:
“God “will give to each according to his WORKS” (Rom 2:6).
“But are you willing to know, O vain man, that faith apart from works
is dead?... For as the body is dead apart from the spirit, so also
faith is dead apart from works” (James 2:20, 26).
So, the whole point is: faith is God’s free gift. But man has to respond actively and positively through good works.
“And so, my dear friends, just as you have always obeyed, not only
when I was with you but even more now that I am absent, continue to
WORK OUT your salvation with fear and trembling” (Php 2:12).
Conclusion
The ultimate long term Will of God is to save the entire humanity. God gives faith as a gift to the called out ones. But since man is given true free will, God will not force anyone to respond. It is entirely up to each individual to respond actively and positively through good works.
However, God has short term goals which in no way affect the ultimate Will of God.