What arguments did supporters use what arguments did opponents of trusts use

Supporters: 

1. This is business NOT a church picnic 
2. Social Darwinism allows for the smartest, shrewdest, and wisest to rise above the weak-minded and cowardly in the business arena 
3. Trusts help regulate quality and supply for the public 

Opponents: 

1. Trusts can set prices for the public thus eliminating fair and healthy competition 
2. Trusts violate the free market system upon which American business is based 
3. Trusts take advantage of small businesses and eventually lead to their death and destruction