The Sign that Jesus gave.
When Jesus answered his Disciples’ question about the sign of the Temple’s destruction, they coupled it with the end of the age (aeon) because the end of the Temple would clearly indicate that the Jewish Age had come to its end.
Likewise, the Disciples believed that this momentous event – the destruction of the Temple – would herald the appearance of Messiah in power. They did not recognize that, instead of coming as a mighty conquering warrior, the Messiah had arrived as a babe. They did not recognize that, instead of coming with almighty power, crushing the nations before it, the Kingdom had come quietly as a farmer sowing seed, and not as a reaper.
They had no idea Jesus was going away. Since he was already with them, the Disciples’ expectation was that Jesus was finally speaking about that great manifestation of power they had long been anticipating. Later, just before Jesus was transported to heaven, the Disciples were still asking him “Lord, are you at this time going to restore the kingdom to Israel?” (Acts 1:6, NIV). To which Jesus answered: “It is not for you to know the times or dates the Father has set by his own authority”.
And as he answered his Disciples’ question about the destruction of the Temple, the “Parousia” and the “End of the Age”, Jesus warned them about deceivers who would claim to be Christ (the Anointed One) pointing to wars and stories of wars.
Never did Jesus speak about the size of those wars, their length, scope or number of casualties. All he said was “see that YOU are not terrified. For these things must take place, but the end is not yet”.
They would hear about wars simply because “nation will rise against nation and kingdom against kingdom”. Things such as “food shortages and earthquakes in one place after another” are not a sign of the death of an Age but are of the very first signs of the labor pains of a birth.
But Jesus did give his Disciples the “sign” of the powerful coming they were expecting and hoping for: “The sign of the Son of Man will appear in the sky, and all the nations of the earth will mourn. They will see the Son of Man coming on the clouds of the sky, with power and great glory. And he will send his angels with a loud trumpet call, and they will gather his elect from the four winds, from one end of the heavens to the other”. (Matt 24:30, 31, NIV).