The concept of the “highest study in the world” is not a well-defined or widely recognized term. Education systems and academic qualifications can vary significantly from one country to another, and there isn’t a universally accepted ranking of the “highest” level of education.
In many countries, the highest level of formal education is typically a doctoral degree, such as a Ph.D. (Doctor of Philosophy) or an equivalent research-focused doctorate. These degrees are typically awarded after completing several years of advanced study and original research in a specific field.
However, the term “highest study” could also be interpreted in a more philosophical or abstract sense, where individuals continue to pursue knowledge and personal growth throughout their lives, beyond formal education.
If you have a specific context or a particular area of interest related to the “highest study,” please provide more details, and I’d be happy to offer more specific information.

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