All the challenges of life are encompassed in the term, Human Condition.   
→ weakness
→ sickness
→ disease
→ poverty
→ hatred
→ violence
→ wars
→ wickedness
→ death

I actually worked for a company which had 'improving the Human Condition' as a phrase in its mission statement.   What they were really about was research which, as interesting and noble as it sounds, does not directly improve any of the aspects of the Human Condition mentioned above.   

But this is true of virtually every secular attempt by man to improve the Human Condition.   

The evidence is all around us that 60 years of the Great Society has actually had the opposite effect on the Human Condition.   As a nation we are worse off now than we were 60 years ago.   

The Human Condition is a result of sin which separated man from God.   So the solution is to deal with sin - not just the symptoms or consequences of sin.   

Guess what?   
That is exactly what Christ Jesus came to do!   

Jesus came to:
→ redeem us from bondage
→ make us into New Spirit beings
→ set us free
→ remove the fear of death
→ bestow God's unmerited favor on us
→ heal us of sickness and disease
→ fill us with the HolySpirit
→ change our identity by making us SonsOfGod
→ enable us to prosper
→ enable us to partner with Him in saving others
→ give us a hope and vision of God's glory manifesting on earth

So we see that Jesus came to save us spiritually, physically, emotionally, psychologically, economically, socially and politically.   And we see that there is no other way for us to be saved that in Him.   

In Christ we have the power and authority to improve the Human Condition in all its dimensions of need.   

The method by which we improve the Human Condition is by preaching the Gospel of the Kingdom Of God.   

In the Kingdom Of God there are not haves and have-nots, sick and healthy, good and bad but all are perfected in Him.   But the requirement for such salvation is specified out here:

Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved. - Act 4:12 This means that all other religions are false.     They do not lead to God.      This is not a Politically Correct verse, but God does not concern Himself with man's politics or his opinions.      God came to earth and we call Him Jesus.      To deny Jesus is to deny God.      To deny Jesus who is the Truth is to deny the Truth and so believe a lie.      For this reason we are to preach the Gospel to every creature throughout the world (Mar 16:15).      Christianity has taken a very narrow view and understanding of salvation, limiting it to the spirit of man that is renewed by faith in Christ Jesus.      Jesus did not talk about or deal exclusively with eternity.     He dealt with the Human Condition in the Physical Realm by healing, by delivering, by teaching and, when necessary, by feeding the hungry.     So, we need to understand that Christ came to make us whole in every aspect of our existence.