Many cultures use garlic in preparation of staple foods. Middle Eastern foods are full of garlic, so are Asian, Caribbean, French, sub saharan Africa and others. Is there a common link when garlic got introduced or a specific event which caused it's adoption? Can you trace garlic to a single point of origin?
Garlic is originally native to Central Asia, with evidence having indicated anywhere from West China right through to the Kazakhstan region. This is based largely on a mixture of genetic comparison and presence in historical records from each region (J. Beograd, Botanika farmaceutika). Garlic has been cultivated for at least 7000 years (M Allan, Medicinal Plants of the Middle East). Depending on the exact region, this can correspond to societies that were living in horticultural lifestyles (domesticating plants but not yet conducting mass agriculture) or farming societies with sedentary habits. There are certainly explicit historical records referring to its usage between 2600 BC and 1000 BC throughout Egypt, Africa more generally, Greece, Rome, Sumeria and China (see, for example, Pliny's Natural History xix).
From the wide range of dates, the fact that garlic cultivation survived numerous societal collapses, it has been surmised that there was no one large event that suddenly spread garlic across Afro-Eurasia, but rather a gradual spread over centuries. Garlic is known for the ease with which it is grown, its tolerance for Mediterranean climates, ability to be grown all year and easy storage. Additionally, garlic was long thought to have medicinal and properties, as well as a place in religious rites (Beograd again). Given its ease of cultivation, strong aroma and taste and early adoption, it's actually the exceptions to garlic-filled cuisine which are more curious. For example, it is present in Chinese cooking, but not in Japanese. It is known that wild garlic grew in Britain but never adopted in cooking (Petrovska and Cekovska, Extracts from the history and medical properties of garlic).
As for Caribbean and Central American cuisines, much like coffee, banana and tea, they were all introduced during the 'Columbian Exchange' of the Spanish conquest, post-1492. This same event is also responsible for some other quirks of cuisine stereotypes such as chili in Indian and Southeast Asian cooking or potatoes in British cooking.
Adding to this, where is garlic (or its genetic predecessor) native to?