How did the organizing of trusts help John d Rockefeller become Wealthy?

John D. Rockefeller utilized trusts to consolidate control over the oil industry, allowing him to eliminate competition and streamline operations. By creating the Standard Oil Trust in 1882, he pooled various oil companies under a single management structure, which facilitated greater efficiency and cost reduction. This strategic organization enabled him to dominate the market, increase profits, and amass significant wealth, ultimately making him one of the richest individuals in history.