mjhjmtu

I want to make a mindmap with tikz for my notes on political philosophy but the child nodes become so little that I cannot read what it's inside.
Here's an example:

As you can see the first nodes are easily readeble unlike the last ones.

This is the code

 begindocument
begintcolorbox[colback=red!5!white,colframe=red!75!black]
 chapter*Liberal Equality
endtcolorbox

begintikzpicture[mindmap, grow cyclic, every node/.style=concept, concept color=blue!10, 
 level 1/.append style=level distance=5cm,sibling angle=90,
 level 2/.append style=level distance=3cm,sibling angle=45,]


nodeRawls
 child[concept color=red!60]nodeHe's in opposition with
 childnodeUtilitarism
 childnodeIntuitionism
 
 child[concept color=blue!60]nodeTwo main arguments
 childnodeIntuitive argument
 childnodeEquality of opportunity
 childnodeEven natural talent is an unfair help
 
 
 childnodeOriginal position argument
 
;

endtikzpicture
enddocument

How can I change the code to eliminate this problem?
Thanks in advance for any answer.

This uses every node/.append style=font=normalsize, makes a few more cosmetic changes, and has a preamble. Yes, preambles are important to attract others to look at your problem.

documentclass[tikz,border=3.14mm]standalone
usetikzlibrarymindmap
begindocument
begintikzpicture[mindmap, grow cyclic, every node/.style=concept, 
concept color=blue!10, 
 level 1/.append style=level distance=5cm,sibling angle=90,
 level 2/.append style=level distance=3cm,sibling angle=45,
 level 3/.append style=level distance=3cm,sibling angle=45,
 text width=1.5cm,minimum size=2.25cm,
 level 4/.append style=level distance=3.5cm,sibling angle=45,
 text width=2cm,minimum size=3cm,
every node/.append style=font=normalsize]


nodeRawls
 child[concept color=red!60]nodeHe's in opposition with
 childnodeUtili\-tarism
 childnodeIntui\-tionism
 
 child[concept color=blue!60]nodeTwo main arguments
 childnodeIntuitive argument
 childnodeEquality of opportunity
 childnodeEven natural talent is an unfair help
 
 
 childnodeOriginal position argument
 ;

endtikzpicture
enddocument