Honestly, Dante, you ask the most unusual questions.
I assume that by “corporations,” you’re talking about large business enterprises, and not simply why the legal entity, the corporation, a fictional “person,” was created. The answer is simple. The corporate form provides a convenient way to raise capital. The better you are at raising capital, the more business you can do. Sole proprietorships have inherent limitations in size and efficiency. If the corporation as an entity, or something like it, were not available, there’d be no IBM, Apple, Microsoft, GM, etc.