Hide all featured images site wide

I’m building out my own cartoon site and using the sidebar navigation template you provide as a demo.

I have managed to code out with css the featured image on the individual posts however, I am not finding a way to hide it on a main page which has the blog posts all on it.

Basically I want to eliminate all featured images site wide.

Presently this page is set to Single author, small preview Pic (no author picture is displayed, feature image is small. Do you have css hack to eliminate the featured image here?

That being said, is there a css hack or functions php hack to just turn off all featured images everywhere? Then I could remove other code I’ve been playing with to take it off the individual pages. ie:
.single .big-preview.single-small, .single .blog-meta {
display: none!important;
}

Thanks so much, you guys rule.

Tony