This book looks at the prospects of Nuclear Complexities in South Asia and explains how it has overshadowed the security of Sri Lanka. It also reveals the reciprocal reinforcement of civil and strategic nuclear domains in the region. The book brings out how complexity leads to insecurity and why small states are entangled in this emerging reality. The book also discusses the historical development of regional nuclear programmes, ‘what’s going on’ in contemporary nuclear South Asia, and ‘where does Sri Lanka fit’ in this strategic equation. It explains the benevolent role that Sri Lanka could play as a small island state-located right in the centre stage of the Indian Ocean—to improve the stability and peace in the region. In this setting, the author sheds a ‘crude look at the whole’ situation and tries to explain the nuclear security emergences in a complex geopolitical setting.