Display all posts from specific category

In your query post, I don’t see your post type parameter. You must need this parameter to get all posts. Please try this follow the code and put it anywhere you want to show it.

<?php 
$post_args = array(
    'post_type' => 'post', //get post by 'post' (default post type).
    'posts_per_page' => -1, //show all posts.
    'tax_query' => array( 
        array( 
            'taxonomy' => 'category', 
            'field' => 'slug', 
            'terms' => array('culture') 
        )
    ) 
);
$the_qry = new WP_Query($post_args);
if($the_qry->have_posts()){
    while($the_qry->have_posts()){
        $the_qry->the_post();

        //show all list the post.
        echo '<li>
                <a href="'.get_permalink().'">'.get_the_title().'</a>
            </li>';
    }
    wp_reset_postdata();
}
?>