Why was thomas paine common sense considered radical

Because it  played a crucial role in convincing colonists to take up arms against England.

Explanation:

Hi, "Common Sense"  written by Thomas Paine,  is credited as playing a crucial role in convincing colonists to take up arms against England. In it, Paine argues that representational government is superior to a monarchy or other forms of government based on aristocracy and heredity.

Paine proposed ideas to the colonists, three ideas for a change.

1) Declare Independence  

2) Create a Republican state government

3) Union of the new states

.Its simplicity but accuracy helped the colonist understand it more easily.

detente translated to english means politics

to keep us neatruel and not get involved in any wars

he assumed control of treaty negotiations with a hostile power