KJV seems to indicate that it is, but ESV/NIV say its the root of all kinds of evil.
1 Tim 6:10 (NIV)
For the love of money is a root of all kinds of evil. Some people, eager for money, have wandered from the faith and pierced themselves with many griefs.
1 Tim 6:10 (ESV)
For the love of money is a root of all kinds of evils. It is through this craving that some have wandered away from the faith and pierced themselves with many pangs.
1 Tim 6:10 (KJV)
For the love of money is the root of all evil: which while some coveted after, they have erred from the faith, and pierced themselves through with many sorrows.
How can the love of money be the root of all evil? Would not the root of all evil be the total depravity of man and the wickedness of his heart? What of a serial killer that DOES NOT love money? What of Adam Lanza and James Holmes? These men did not love money but loved killing. These were/are wicked men so it would not make sense that the love of money would be the root of all evil.
Take the verse in context. This passage addresses Christian discipleship.
1 Timothy 6:6-12 NAS77
6 But godliness actually is a means of great gain, when accompanied by contentment.
7 For we have brought nothing into the world, so we cannot take anything out of it either.
8 And if we have food and covering, with these we shall be content.
9 But those who want to get rich fall into temptation and a snare and many foolish and harmful desires which plunge men into ruin and destruction.
10 For the love of money is a root of all sorts of evil, and some by longing for it have wandered away from the faith, and pierced themselves with many a pang.
11 But flee from these things, you man of God; and pursue righteousness, godliness, faith, love, perseverance and gentleness.
12 Fight the good fight of faith; take hold of the eternal life to which you were called, and you made the good confession in the presence of many witnesses.
You can be dirt poor and be content. You cannot be ungodly and be content. Folks, in their desire to want more things have walked away following the Lord. They press to gain more stuff at the cost of desiring more of the sufficiency of Christ.
This is the consummate counter-prosperity passage. Jesus said something like this in Matthew 6:33 "But seek first His kingdom and His righteousness; and all these things shall be added to you." Choosing to pursue material gain first is ruinous to a fulfilling Christian walk.
This is how Webster defines evil
E'VIL, a. e'vl. [Heb. to be unjust or injurious, to defraud.]
1. Having bad qualities of a natural kind; mischievous; having qualities which tend to injury, or to produce mischief.
Some evil beast hath devoured him. Gen 37.
2. Having bad qualities of a moral kind; wicked; corrupt; perverse; wrong; as evil thoughts; evil deeds; evil speaking; an evil generation.
3. Unfortunate; unhappy; producing sorrow, distress, injury or calamity; as evil tidings; evil arrows; evil days.
E'VIL, n. Evil is natural or moral. Natural evil is any thing which produces pain, distress, loss or calamity, or which in any way disturbs the peace, impairs the happiness, or destroys the perfection of natural beings.
Moral evil is any deviation of a moral agent from the rules of conduct prescribed to him by God, or by legitimate human authority; or it is any violation of the plain principles of justice and rectitude.
There are also evils called civil, which affect injuriously the peace or prosperity of a city or state; and political evils, which injure a nation, in its public capacity.
All wickedness, all crimes, all violations of law and right are moral evils. Diseases are natural evils, but they often proceed from moral evils.
2. Misfortune; mischief; injury.
There shall no evil befall thee. Psa 91.
A prudent man foreseeth the evil, and hideth himself. Prov 22.
3. Depravity; corruption of heart, or disposition to commit wickedness; malignity.
The heart of the sons of men is full of evil. Eccl 9.
4. Malady; as the king's evil or scrophula.